Changed Message Center default prompt to one for which we have translations.
Removed debug color from iOS 6 Message Center textfield.
Added in 73320c0ca4283bb62cdd6cb56cd5eeaf44ed4e84
Added `ATSurveyShownNotification` when a survey is shown.
Version 1.5.7
Converted `at_chat_bg.png` to 8-bit input depth.
Fixes CocoaPods error on `pod spec lint`:
`- NOTE  | [iOS] [xcodebuild]  libpng warning: Warning: Input PNG does not have an 8 bit input depth.  Please convert your PNG to 8-bit for optimal performance on iPhone OS.`
Fixes IOS-637
iOS 8 fix/hack for rotating the Message Panel.
Should replace with an Auto Layout view.
Fix/hack for horizontal presentation of Message Panel in iOS 8.
Hack/fix for iOS 8 issue where frame's animation is offset from (0, 0) origin when animation starts from landscape.
Will soon convert Message Panel to use Auto Layout.