avatar factory docs
button factory docs
timestamp formatter docs. ref #172
message VC docs. ref #172
JSQMessagesCollectionViewFlowLayout docs. ref #172
fix comments
doc formatting
layout attribute docs ref #172
text view and label docs
refine image category.
edit VC docs
implement copy & paste messages. ref #172
implement tap avatar. ref #172
refactor cell delegate
prevent observers from being added more than once during interactive transitions