ANTIRUINS v081

Some small bugfixes

• CDDA track number wierdness (fixed by Ross from Orc Face Games)

• Error when freeing a texture with no palette (fixed by Ross from Orc Face Games)

• Fixed some Z ordering problem with texts and shapes

• Fixed some new collision problems because of compilers wierdness (thanks Falco)

• Reworked alot of the camera stuff, still not perfect(…clamping) but usable.

• Added a sprite:isPlaying() function to detect if there is an animation currently running.