Updating message borders to match Hipchat 2.0 style
Merge remote-tracking branch 'origin/master'
Update padding and line separation to match Hipchat 2.0 style
Blue line above 'me' user. Link markings fix.
Update system message colors to mimic HipChat 2.0
Update system message colors to mimic HipChat 2.0. Yellow box
Update system message colors to mimic HipChat 2.0. Red box.
Update day date separator
Update 'tagMe'
Update colors and link block background.
Use same font as Hipchat v2. 'Lucida Grande' instead of Helvetica.