Missing keys

Hello!

It would be really (really!) useful to have more keys available for scripting. For example, the comma key is missing (at least in the docs). Why would I need the comma key? Well I use the Dvorak keyboard layout, and comma there is w on qwerty. So it's kind of unhandy if I have to set my keyboard to qwerty everytime I test out the game. So please add more keys

Cheers,
BitPuffin