More Lua integrations

- cPrint = null
+ Key(id), returns SFML.Window.Keyboard.Key.<id>
+ Autoload Mods
+ onUpdate hook
+ GameInput Integration
+ Changed up init.lua, added 'Jump' (Space, Key.57) to GameInput
Merge pull request #2 from LexTheGreat/Lua-Integrations

More Lua integrations
Merge pull request #1 from eatenbrain/master

More Lua integrations PullRequest