disable fps widget when recording

add videorec button descriptions and delete screenshot when video is deleted (issue #427)

apparently we are forced to use a (dummy) callback for glut 3.0 compatibility

increase framerate and bitrate (issue #427)

double cleaver rotation speed, also make spin direction dX dependent.

Slight update of russian translation

Choose first unused color for added team (addresses issue #431) + other small changes

add SDL as an dependency

let animation objects delete themselves after they are not being used anymore PS: I don't like that we create new animation objects every single time before a page transition is done, I'm sure that can be done in a nicer way. But at least we're not keeping those non-reused objects around forever now...

revert tremor back to a version before koda broke it ;p