Usability fixes to the UX and new props

Scroll to bottom after onSend, Add enablesReturnKeyAutomatically setting to end on return key (PR @alizbazar)
New prop onMessageLongPress (PR @corymsmith)
displayNamesInsideBubble and keyboardShouldPersistTaps props (PR @koppelaar)
Expose full rowData to renderCustomText and add dynamic hide/show text input (PR @bpeters)

Fix image position, Add hideTextInput prop

v0.0.3

Fix image position, Add hideTextInput prop