Debug commit
Added code to replace sprites with a checkerboard pattern in order
to identify filtering issues.
This version only renders DrawSprite()'s with the checkerboard pattern
for debugging purposes
cleaned up some unneeded stuff
rework saving of camera positions so there is no need to know framerate during prerecording.
support x264 on older versions of ffmpeg/libav.
remove some unuseful options.
Tell AI to avoid edges, especially ones over water (this does not include checking whether a knock could drown yet). Also make flakes pick a new random dx/dy on respawn to further reduce patterns. Also disable a couple of weapons for the particularly dumb AI levels, and disable switching for the dumbest.