fix import
adjust toolbar constraints
fix demo
fix toolbar constraint issues and button widths not setting properly. fixes #460
move collection view delegate and data source definitions to their own header files to clean up collection view header.
move JSQMessagesCollectionViewCellDelegate implementation from controller to collectionView
reset cell text on prepareForReuse. #316
improve cell selection and menu handling. close #261
version nums
move UIMenuController handling from cell to collectionView. fix #458. fix #254. close #463. ref: #393.
Merge branch 'newMenuController' into develop
remove dead code
expose cell properties messageBubbleContainerView and avatarContainerView
refine UIMenuController display. #458, #254, #463, #393
version nums
fix data detectors bug. close #465.
bump version nums
prevent messageBubbleLeftRightMargin from being negative. fix #486
close #484
fix settings