#417 Initial CSS and helper for messages
#417 Private messages using new css
#417 Added CSS for "hidden" messages and code for converting quick links to sentence
#417 Reviewed a bit the visual. Added warning image.
#417 sentence_comments/index
#417 home
#417 Updated comments on sentences/show
#417 Updated comments on sentence_comments/of_user and on_sentences_of_user
#417 Updated comments on users/show
#417 Moved position of PM button.
#417 Updated sentence_comments/edit and deleted elements/comments.css
#417 Removed PM button on messages of current user.
#417 Fixed private_messages/write
#417 Updated wall/index
#417 Fixed display of new reply and cleaned up some code.
#417 Updated wall messages everywhere else
#417 Fixed undefined variable and readjusted font-size and positioning of date
#417 Fixed undefined variable error.
#417 Some clean up.
#417 Clickable avatar, and some more clean up.