Fixing slow key issues with the FACOM converter

- Required some small API changes, shouldn't affect any other Scan modules (addition of a parameter)
- Still have the latching annoyances for some of the modifiers
- Swapped Esc and Tilde for convenience
- Removed the old Esc key from the latch list (no one needs 13 latches anyways...)
- Added the control cluster mappings (Insert, Delete, Home, End, PgUp, PgDn)
- All other misc keys are currently un-assigned if a keycap legend doesn't map to anything known
  (e.g. blank keys, 000 and 00 are mapped, but your OS probably doesn't know what they mean :P)

Scan/FACOM6684/scan_loop.h

@@ -56,8 +56,8 @@ uint8_t scan_loop( void );
 // Functions available to macro.c
 uint8_t scan_sendData( uint8_t dataPayload );
 
-void scan_finishedWithBuffer( void );
-void scan_finishedWithUSBBuffer( void );
+void scan_finishedWithBuffer( uint8_t sentKeys );
+void scan_finishedWithUSBBuffer( uint8_t sentKeys );
 void scan_lockKeyboard( void );
 void scan_unlockKeyboard( void );
 void scan_resetKeyboard( void );