Added functions to find the reserved cargo count for all scheduled vehicles.  This is the counterpart to the same function for enroute vehicles
Refactored functions as needed to avoid repetition.

The new functions are not used yet.
Merge branch 'chr7/dev'

Conflicts:
	scheduler/vehicleinfo.nut
I botched the merge and deleted a }
Fixed a typo in GetScheduledReservedCargoCount that was returning enroute cargo count.
Declared functions