diff --git a/demo/buffer.php b/demo/buffer.php
deleted file mode 100644
index 71a62e3..0000000
--- a/demo/buffer.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-  // Adapted for The Art of Web: www.the-art-of-web.com
-  // Based on PHP code by Dennis Pallett: www.phpit.net
-  // Please acknowledge use of this code by including this header.
-
-  // Updated to include and use last-modified and etag headers
-
-  // location and prefix for cache files
-  define('CACHE_PATH', "/tmp/cache_");
-
-  // how long to keep the cache files (seconds)
-  define('CACHE_TIME', 5 * 60);
-
-  // return location and name for cache file
-  function cache_file()
-  {
-    return CACHE_PATH . md5('buffer'.$_SERVER['REQUEST_URI']);
-  }
-
-  // display cached file if present and not expired
-  function cache_display()
-  {
-    $file = cache_file();
-
-    // check that cache file exists and is not too old
-    if(!file_exists($file)) return;
-    $last_modified_time = filemtime($file);
-    if($last_modified_time < time() - CACHE_TIME) return;
-    $etag = md5_file($file);
-
-    // always send headers
-    header("Last-Modified: ".gmdate("D, d M Y H:i:s", $last_modified_time)." GMT");
-    header("Etag: $etag");
-    header("Expires: ".gmdate("D, d M Y H:i:s", $last_modified_time + CACHE_TIME)." GMT");
-
-    // tell any caches that I really mean it with these other headers
-    header("Cache-Control: max-age=".CACHE_TIME.", must-revalidate");
-
-    // exit if not modified
-    if (@strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $last_modified_time ||
-        @trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag) {
-        header("HTTP/1.1 304 Not Modified");
-        exit;
-    }
-
-    // if so, display cache file and stop processing
-    readfile($file);
-    exit;
-  }
-
-  // write to cache file
-  function cache_page($content)
-  {
-    if(false !== ($f = @fopen(cache_file(), 'w'))) {
-      fwrite($f, $content);
-      fclose($f);
-    }
-    $last_modified_time = time();
-    $etag = md5_file('buffer'.$file);
-
-    // always send headers
-    header("Last-Modified: ".gmdate("D, d M Y H:i:s", $last_modified_time)." GMT");
-    header("Etag: $etag");
-    header("Expires: ".gmdate("D, d M Y H:i:s", $last_modified_time + CACHE_TIME)." GMT");
-
-    return $content;
-  }
-
-  // execution stops here if valid cache file found
-  cache_display();
-
-  // enable output buffering and create cache file
-  ob_start('cache_page');
-?>
diff --git a/demo/index.php b/demo/index.php
deleted file mode 100644
index f816f81..0000000
--- a/demo/index.php
+++ /dev/null
@@ -1,93 +0,0 @@
-<!DOCTYPE html>
-<html lang="en-US">
-<head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0">
-  <title>NeatCharts demo</title>
-  <style>
-    main {
-      -webkit-columns: 800px 2;
-      -moz-columns: 800px 2;
-      columns: 800px 2;
-    }
-    section {
-      display: inline-block;
-      width: auto;
-      max-width: 800px;
-      padding: 10px;
-      vertical-align: top;
-    }
-  </style>
-</head>
-
-<body>
-  <header>
-    <h1>NeatCharts demo</h1>
-  </header>
-  <main>
-    <section>
-      <h2>Poloniex Dash/BTC Price</h2>
-      <img src="poloniex-dash-btc.php" alt="Poloniex Dash/BTC price">
-    </section>
-
-    <section>
-      <h2>Fake Stock Market Data</h2>
-<?php
-ini_set('display_errors', 1);
-require '../src/NeatCharts/LineChart.php'; // just use composer instead of this
-
-// fake up some stock market data
-
-$chartData = [];
-
-$offset = 100 * (rand()/getRandMax())**4;
-$scale = 100 * (rand()/getRandMax())**2;
-$volatility = 0.5 * (rand()/getRandMax())**3;
-
-for ($n = 0, $current = $offset + 0.5 * $scale; $n < 96; $n++) {
-  $current -= $offset;
-  $current *= 1 + $volatility * (rand()/getRandMax() - 0.5);
-  $current += $offset;
-  $chartData[$n] = $current;
-}
-
-$stockChart = new NeatCharts\LineChart($chartData, [
-  "width"=>500,
-  "height"=>150,
-  "fontSize"=>10
-]);
-print $stockChart->render();
-?>
-    </section>
-
-    <section>
-      <h2>Monotonically Smoothed Chart</h2>
-<?php
-$chartData = [];
-
-$start = 100 * (rand()/getRandMax())**3;
-$volatility = rand()/getRandMax() + 0.01;
-$velocity = (rand()/getRandMax() - 0.5);
-$acceleration = 0.1 * (rand()/getRandMax())**2;
-
-for ($n = 0, $current = $start; $n < 12; $n++) {
-  $velocity *= 0.5;
-  $velocity += $acceleration * 2 * (rand()/getRandMax() - 0.5);
-  $current += $velocity;
-  $chartData[$n] = $current;
-}
-
-$tempChart = new NeatCharts\LineChart($chartData,  [
-  "width"=>700,
-  "height"=>400,
-  "lineColor"=>"#D00",
-  "labelColor"=>"#777",
-  "smoothed"=>true
-]);
-print $tempChart->render();
-?>
-    </section>
-  </main>
-
-</body>
-</html>
diff --git a/demo/poloniex-dash-btc-png.php b/demo/poloniex-dash-btc-png.php
deleted file mode 100644
index 890b2e0..0000000
--- a/demo/poloniex-dash-btc-png.php
+++ /dev/null
@@ -1,66 +0,0 @@
-<?php
-//ini_set('display_errors', 1);
-
-/*
-
-Display a 7 day Dash/BTC chart from Poloniex as a PNG (converted from SVG by imageMagick)
-requires the imagick module be installed
-
-*/
-
-header("Content-Type: image/png");
-header('Content-Disposition: inline; filename="Dash-24h-chart-' . date('Y-m-d\THisT') . '.png"');
-require 'buffer.php';
-require '../src/NeatCharts/LineChart.php'; // really just use composer instead
-
-function getJson($url) {
-  if (empty($url)) {
-    trigger_error('Missing or empty JSON url');
-  }
-  $ch = curl_init($url);
-  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-  curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: application/json'));
-  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
-  curl_setopt($ch, CURLOPT_TIMEOUT, 3);
-//  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
-//  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
-//  curl_setopt($ch, CURLOPT_CAINFO, getcwd() . "/VeriSignClass3PublicPrimaryCertificationAuthority-G5.pem");
-
-  $result = curl_exec($ch);
-  $result = json_decode($result) or trigger_error('Couldn\'t parse JSON');
-  return $result;
-}
-
-$yesterday = time() - (7 * 24 * 60 * 60);
-$poloniex_url = 'https://poloniex.com/public?command=returnChartData&currencyPair=BTC_DASH&start=' . $yesterday . '&end=9999999999&period=' .
-//300 //5 min
-//900 //15 min
-1800 //30 min
-//7200 //3h
-//14400 //6h
-//86400 //1d
-;
-$last24h = getJson($poloniex_url);
-$chartData = [];
-
-foreach ($last24h as $item) {
-  $chartData[$item->date] = $item->weightedAverage;
-}
-
-$poloniexChart = new NeatCharts\LineChart($chartData, [
-  'width'=>800,
-  'height'=>200,
-  'lineColor'=>"#1C75BC", // Dash blue
-  'labelColor'=>"#777",
-  'smoothed'=>false,
-  'fontSize'=>10
-]);
-$svg = $poloniexChart->render();
-
-$im = new Imagick();
-$im->setBackgroundColor(new ImagickPixel("transparent"));
-$im->readImageBlob($svg);
-$im->setImageFormat("png32");
-echo $im;
-$im->clear();
-$im->destroy();
diff --git a/demo/poloniex-dash-btc.php b/demo/poloniex-dash-btc.php
deleted file mode 100644
index 72fa0b8..0000000
--- a/demo/poloniex-dash-btc.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-//ini_set('display_errors', 1);
-
-Header('Content-type: image/svg+xml; charset=utf-8');
-Header('Content-Disposition: inline; filename="Dash-24h-chart-' . date('Y-m-d\THisT') . '.svg"');
-require 'buffer.php';
-require '../src/NeatCharts/LineChart.php'; // really just use composer instead
-
-function getJson($url) {
-  if (empty($url)) {
-    trigger_error('Missing or empty JSON url');
-  }
-  $ch = curl_init($url);
-  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-  curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: application/json'));
-  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
-  curl_setopt($ch, CURLOPT_TIMEOUT, 3);
-//  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
-//  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
-//  curl_setopt($ch, CURLOPT_CAINFO, getcwd() . "/VeriSignClass3PublicPrimaryCertificationAuthority-G5.pem");
-
-  $result = curl_exec($ch);
-  $result = json_decode($result) or trigger_error('Couldn\'t parse JSON');
-  return $result;
-}
-
-$yesterday = time() - (24 * 60 * 60);
-$poloniex_url = 'https://poloniex.com/public?command=returnChartData&currencyPair=BTC_DASH&start=' . $yesterday . '&end=9999999999&period=' .
-//300 //5 min
-900 //15 min
-//1800 //30 min
-//7200 //3h
-//14400 //6h
-//86400 //1d
-;
-$last24h = getJson($poloniex_url);
-$chartData = [];
-
-foreach ($last24h as $item) {
-  $chartData[$item->date] = $item->weightedAverage;
-}
-
-$poloniexChart = new NeatCharts\LineChart($chartData, [
-  'width'=>800,
-  'height'=>250,
-  'lineColor'=>"#1C75BC", // Dash blue
-  'labelColor'=>"#777",
-  'smoothed'=>false
-]);
-print $poloniexChart->render();
