Separate gamepad state code from gamepad event code and other customizations#700

Merged

cart merged 3 commits intobevyengine:masterfrom simpuid:gilrs_extra

Oct 21, 2020

+352-230

Commits on Oct 18, 2020

Separated gamepad event and gamepad state code and made gamepad input more customizable
simpuid
committed
Changed parameter of get and remove of Axis<T> from &T to T
simpuid
committed

Commits on Oct 21, 2020

Simplify gamepad_input example and refactor bevy_input::gamepad
simpuid
committed