add close button to topic panels
ignore database dumps from repo
dont require ruby 2.0.0
fix database connection
update gems
use bower gem
Merge branch 'master' of https://git.heroku.com/codecruise
use default location for bower components

because of https://github.com/rails/rails/pull/7968, all files under
app/assets/ are automatically compiled. this gets around the issue of
files without extensions being included by sprockets.