Server errors log
fix utils.jsonp()
fix jsonp errors text
merge master -> log-server-errors
Talk to social_source using postMessage
remove utils/pubsub.js.coffee
move utils.log/warn to warnings.js.coffee
disable dropbox tab by default
fix "can't select same file twice"
Merge pull request #80 from uploadcare/talk-to-social-source-using-post-message

Talk to social_source using postMessage
Merge branch 'master' into log-server-errors

* master:
  fix "can't select same file twice"
  disable dropbox tab by default
merge master -> log-server-errors
Merge pull request #79 from uploadcare/log-server-errors

Server errors log
merge master -> multiupload
use utils.jsonp() in FileGroup