Make kw/symbol/comment syntax highlighting more visible

Keywords/symbols used to be a light yellow that was hard to read on
the light background, changed to use something almost equal to the
yellow from Solarized.

For comments, the current grey would be fine on a white bg, but on
the light grey code example bg, it needs to be slightly darker for
contrast.  It could go even darker, to #808080 or so.
Merge tag '0.3.6' into develop

Release 0.3.6
Bugfix: handle missing related files better
Fix #92
Fix #97
Fix #80
Bugfix: Harden Grimoire against missing entities

Fixes #85
Add anote about what branch PRs should go to
Bugfix: missed a few (drop 2)s
bloody local/global aliasing...
Make kw/symbol/comment syntax highlighting more visible

Keywords/symbols used to be a light yellow that was hard to read on
the light background, changed to use something almost equal to the
yellow from Solarized.

For comments, the current grey would be fine on a white bg, but on
the light grey code example bg, it needs to be slightly darker for
contrast.  It could go even darker, to #808080 or so.
Merge pull request #100 from leifp/readability

Make kw/symbol/comment syntax highlighting more visible
Provide /favicon.ico

Fix #94
Clean up error handling quite a bit
Add a helper for getting the right file
Use the helper to include errors in routing
Purge most of the explicit path munging
Merge branch 'feature/fs-api' into develop
bump
Merge branch 'release/0.3.7'