Nexus 1.1

update documentation
update bot image to match opponent
update status display
add control key to boot
add control key to toggle sound
update boot control to avoid double-click
update event timer to reactivate repeat for PyJ2D/Pyjsdl
update mask collision for Pyjsdl
update control when interface module unavailable
update for Python 3 compatibility

Nexus 1.0

Initial release