Timedemo accuracy and feature improvements

• Don't include wipe duration in timedemo counter
  • timedemo was including the beginning level wipe in its counter when it should not, so I made it reset after the wipe.
  • SSNTails encountered this when he changed the DoScreenWipe() logic and found that the wipe texture loading was affecting the timedemo counter.
• Add FPS count to OpenGL by incrementing framecount in HWR_RenderPlayerView()
• Add CSV functionality, see below comment.