Disable framing

Set the X-Frame-Options to DENY for added security.
Fixed case for header
relax username validation (#413)

this commit allows for matching accented characters, dots, '@' symbol,
and other important things.
Adding brackets.

Too much Coffeescript. Had some filters on. :)
monkeypatching the 404 route to handle missing languages and client side scripts. Removing "soft 404" in favour of hard 404 due to complaints from google webmaster tools
special theme.set socket call + static dir support, closes #427, tweaked languages 404 to work with subdirs
issue #427 - proper handling of theme reverting
#426
closed #432 - added link rel="up" and rel="alternate" to category and
topic pages
closes #425
Merge branch 'master' of https://github.com/designcreateplay/NodeBB
logo links to homepage
added relative path to logo
closes #426
closes #422, will restart over if reconnection fails after x number of attempts
updated all RDB.hget in posts to use getPostField. new post filters for retrieving and saving posts. made editPost saving synchronous.
random whitespace
notifications page + ajaxify route + css styling
Merge branch 'master' into notifications_page
mark all notifs as read functionality. CSS tweaks...