Merge pull request #1 from crvenana/master

Blog post corrections
Merge pull request #2 from crvenana/master

Semantic error fixed.
Moved posts not yet started from _drafts to _ideas
New post about Haskell and JSON.
Renamed first blog post.

Underscore in post name from now on.
Prev and Next in _layouts/post now relative links.
New draft about Actors in Ruby.
Build before deploying
Typo fixes.
Some minor fixes and additions to the Aeson post.
Moved the new HS post to _posts + minor additions.
Minor style fixes.
Enabled comments for Aeson post.
Fixed GA (wasn't being renered) + extracted it to partial.
Progress on Celluloid/Actors post.