#5 default key cfg makes Windows' "Sticky Keys" dialog show up

[David Lee Ludwig]

A default install of Windows 7, possibly other versions as well, has a feature whereby a "Sticky Keys" dialog will come up when the Shift key is rapidly pressed. This causes pongbat to get minimized.

Pongbat's default key config has player 1 using the Left-Shift key to move up. This tends to cause Sticky Keys to be enabled very quickly.

Proposed fix: change the default key layout, or find a way to temporarily and programmatic-ally disable the Sticky Keys hot-key.