Create initial "Developer Guide" and "API Reference" pages
Fix page id
Add internal links to the Developer guide page
1. Shifted format from pandoc-style markdown to original markdown.

2. Changed "blockchain" to "block chain"

Signed-off-by: David Harding <dave@dtrt.org>
Update developer-guide.md

1. Remove commented-out table which was causing website build problems.
Merge pull request #3 from harding/dev

Remove special formatting and s/blockchain/block chain/
Fix table of content style and markdown
Fix table of content missing or broken links