Ignore .xccheckout
Fix error not being shown when failing to verify SMS code
Merge pull request #204 from dmdeller/textSecure-error-handling

Fix error not being shown when failing to verify SMS code
Integrating the TextSecure Contact Discovery.
Adapting to changes to SubProtocol and InboxView
Signals: Reinstate empty table view footer
Merging UI enchancements.
Merge branch 'textSecure' of https://github.com/WhisperSystems/Signal-iOS into textSecure
Signals: Fix mistake in removing observer for Socket Notifications