Move unicorn to heroku group

As well as capistrano gems to development. Should help speed
deployments.

Supports opengovernment/ops#76  & opengovernment/ops#78
Update Chicago session & term data to be accurate
Add question count per state & current state

For #158
change favicon to question mark logo #214
retina favicon
add google plus to sharing modal #211
re-arrange buttons in sharing modal #212
add map icon into header #152
change copy for map link #152
copy updates
testing copy edit

testing edit
fix facebook share image #213
adjust height of eleced officials boxes on q create #215
fix elected official desc to not run in to avatar #222
firefox fix
add share link to question show pages #220
testing David commit

Capistranooooo
add styling to error pages #202
add styles for modules on question show pages #210
new modal split design #171