Fixed the bug in which major frame repeatedly skips. As part of this fix, the emulator now ignores and dumps any commands which are received with a major frame number less than the emulator�s current major frame.
Fixed a bug which caused the emulator to send a major frame update asynchronously (relative to PPS) if a major frame skip is detected. This likely caused the inconsistent timing of time messages to the instrument. In the new design, major frames are strictly updated on the 1PPS.
