Add option to clear or not clear text view after submit
Renames CGRectInvert to SLKRectInvert
Improves external keyboard detection
Merge branch 'master' of https://github.com/electic/SlackTextViewController into electic-master
Merge branch 'electic-master'
Minor renaming & defaulting
right button layout for image button, left/right buttons button type switched to custom
Disables isFirstResponder check in willShowOrHideKeyboard:
Break support for external keyboard to fix autolayout bug in parent controller