Closes #443
Merge pull request #444 from dim0v/develop

fixes #443
fix imports for projects without a pch. bump version numbers. fix podspec assets. close #435
fix podspec again. #435
version 5.2.3
fix podspec. close #449
move status bar notification handling to keyboard controller
refactor keyboard delegate/notification methods to single notify helper method
update collection view docs
remove status bar notifications from keyboard controller, re-add to view controller. fix in-call status bar layout issues. close #434
remove duplicate layout constraints in xibs. close #264
version nums
Merge remote-tracking branch 'upstream/master'