Add a functional test to detect the late hangup bug
Handle sending null ice candidates so that SPAs can reconstruct SDPs if necessary for providers that don't support trickle ICE
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
Address review comments
Merge pull request #288 from Standard8/null_ice_candidate

Handle sending null ice candidates so that SPAs can reconstruct SDPs if necessary for providers that don't support trickle ICE
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
Merge branch 'master' into production