Add a comment.
Use erlang.mk instead of rebar.
Config files.
Fix HTTP 406 Not Acceptable error for robots.txt

- ".txt" isn't in cowlib's top-ten of file extensions.
- so we think it's application/octet-stream.
- GoogleBot passes Accept: text/plain.
- No likey.
Include 'ace' dependency.
Fix create posts.

- Forgot the author_id.
Merge branch 'master' into production