destroy zombie likes when likable is invalid

 - or when a Like tracking code doesn’t associate to a user
Merge pull request #260 from codebender/bad_likes

destroy zombie likes when likable is invalid - Bounty 456
Remove blog from coderwall
Merge pull request #266 from lblackburn/master

Remove blog from coderwall
Added z-index to make clicking the upvote button possible
remove leaderboard
Merge pull request #267 from seuros/master

remove leaderboard
Refactor opportunities controller tests to separate one assert per test
Add remote to opportunity
Add remote tag in the opportunity partial
Add remote filter into the jobs listing page
Filter opportunities by remote
Updated i18n
fixed .ruby-version
load view analytics in job only in production
show notice
Fix "Cannot visit Regexp" : Don't need visa anymore.
Merge pull request #269 from seuros/master

tweaks and fix jobs
Merge pull request #268 from jeroenvisser101/patch-1

Added z-index to make clicking the upvote button possible
Merge pull request #271 from nicolasiensen/bounties/441

Add remote filter for opportunities list #441
Add icons for Apple devices