Add the missing import isKeyEvent
Add MovementKeysStr @ keyconstants
Add isKeyPressEvent function @ keyutils
Add isKeyReleaseEvent function @ keyutils
Refactor isKeyEvent using isKeyPressEvent & isKeyPressEvent
Add Keymods
Add isKeymod
Discard keyrelease events and mod-only events
Add string utils with capitalizeStr
Using capitalizeStr in isKeymod
Remove notes about weird key behaviours, it exists only in Ruby qtbindings