Better controller management

[Francis Cornaire]

The mod assume the player is using a controller (XInput) while letting the keyboard as player 2
This is obviously not optimal since it bypass several cases.
What needed is :

• Patch directly (if possible ?) the base ControllerInput class
• Add missing controller (Defaulting to Keyboard ?) automatically to be used by the remote(s) player(s)

[Francis Cornaire]

Implemented in #78