verify outlets. close #604
expose cache countLimit. set default to 200. ref: #492
fix toolbar constraints and correctly size send button to fit text. close #603
adjust input toolbar layout and button sizes.
refactor JSQMessage hierarchy. remove Text and Media subclasses, absorb into single JSQMessage class. close #602
fix version numbers
Update README.md
Update README.md
Update README.md
Update README.md
add message bubble red color
update screenshots
update pod spec
Update README.md
update screenshots and spec
Update README.md