basic implementation of ICE failure notifications in chat window
added missing tests for NotificationView
added link to ice candidate state specification
Add a functional test to detect the late hangup bug
Fix grey block flashing on conversation window open
Chat: attach unique ids to calls

This allow us to differentiate calls and drop messages aimed to past calls.
Fix tests
Payloads: Offer carries a callid
More frontend tests
Fix minor typo
Merge pull request #290 from tOkeshu/fix-late-hangup

Fix late hangup
Merge pull request #289 from dmose/flashing-block-fix

Fix grey block flashing on conversation window open, r=@Standard8
Get the import contacts button working nicely and update the client key so that import works on non-localhost
Update comment for the Google client id
Address review comments
Merge pull request #291 from Standard8/google_contact_import_prod_fix

Get the import contacts button working nicely and update the client key so that import works on non-localhost, r=@dmose
Add a config class to the functional tests to manage loading the test config and handle calculated configuration values
Add a configuration option for the ignore time of the conversation window, and use it to shorten tests
Fix pyflakes issues
Use an alias for DEFAULT_WAIT_TIMEOUT to simplify code