Dev Docs: Add Glossary Entries & Search Links

This adds the data used to populate the glossary and search terms.

Closes #593

_data/glossary/en/block-chain.yaml

@@ -0,0 +1,36 @@
+---
+# This file is licensed under the MIT License (MIT) available on
+# http://opensource.org/licenses/MIT.
+
+required:
+                                           #-------------40 characters-------------#
+    title_max_40_characters_no_formatting: Block Chain
+
+    summary_max_255_characters_no_formatting: >
+        A chain of blocks with each block referencing the block
+        that preceded it. The most-difficult-to-recreate chain is
+        the best block chain.
+
+    synonyms_shown_in_glossary_capitalize_first_letter:
+        - Block chain
+        - Best block chain   ## this could be moved into its own entry
+
+optional:
+    synonyms_and_pluralizations_not_shown_in_glossary:
+        - block chains
+        - blocks chain
+        - block-chain
+        - block-chains
+        - blockchain
+        - blockchains
+        - best block chain
+        - best blockchain
+
+    not_to_be_confused_with_capitalize_first_letter:
+        - Header chain
+
+    links_html_or_markdown_style_capitalize_first_letter:
+        - "[Block chain](/en/developer-guide#block-chain) --- Bitcoin.org Developer Guide"
+        - "[Block chain](https://en.bitcoin.it/wiki/Block_chain) --- Bitcoin Wiki"
+
+---