Omit a few commands from "DL Unknown" in debug.
Switch to 59.94 fps rather than 60.
Track hcount as an integer, not a double.

Since it's even with NTSC.  Makes much more sense.
Merge pull request #4577 from unknownbrackets/vblank-interval

Switch to 59.94 fps rather than 60, since we say we are 59.94