* Revise P2P Networking section to provide a more detailed description
of initial peer discovery and DNS seeds.
* Tweak autocrossref.rb to allow term blacklisting. Use this new feature
to prevent cross referencing "address" in "IP address" to the
definition of Bitcoin P2PKH/P2SH addresses. This avoids a bunch of
manual "norefs".
* Sorted the _includes/references.md file as it became unclear where
links should be added.
* Fixed accidentally lowercased "merkle" at start of sentence.
Based on a suggestion made by @petertodd to the -devel mailing list and
the discussion in that thread by him and other participants.
* We've been using the term "consensus", but this commit introduces a
formal definition for it and "consensus rules" as part of the block
chain introduction.
* Describe that consensus rules may change and may happen when they
do: hard or soft forks.
* Describe how full nodes can detect hard or soft forks, then describe
how SPV clients can detect hard and soft forks using the more limited
information available to them.
* Add a short subsection about the different byte orders used with
hashes in Bitcoin Core and other software.
* Re-word some text in other sections to mention the byte order
differences
This commit created based on comments from @SergioDemianLerner (thanks!)
* Adds the #bitcoin-dev IRC channel, Bitcoin StackExchange, and
BitcoinTalk Dev & Tech board to the development page.
* Links to that section of the page from the devel docs.
* Replace previous TX Overview image with a simplified illustration.
The previous overview image was commented out in pull #566 / commit
6afc683. New image incorporates suggestions by @saivann (thanks!)
* Add new illustration showing the specifics of outputs and inputs (and
how they're related). This replaces most of the detail lost by using a
simplified overview image
* Add two short paragraphs briefly describing the ouput and input
features, leading into the existing detailed P2PKH description
