v0.905

Made it possible to map xinput controllers via the config file. With lines like this:
xinput_controller_1 = "1"
xinput_controller_2 = "2"
xinput_controller_3 = "3"
xinput_controller_4 = "4"

Also made it possible to cycle between players by pressing RB and LB if the controller is mapped to multiple players in the config. Example:
xinput_controller_1 = "12"
xinput_controller_2 = "34"
xinput_controller_3 = "0"
xinput_controller_4 = "0"