general update

Update:
- fixed building text errors
- renamed unique building code.
next update:
- fix or alter any code that needs attention.

update:
- reverted back to previous unitclass classifications.

update:
- UnitClass OverRide OverHaul
- made a few new units
- organized civilization units into their own folders.

update:
- fixed unit errors.

update
- fixed unit errors.

update:
- unit overhaul.

update:
- code clean up.

update:
- hopefully fixed the error that wouldn't allow units to aboard troopship and aas units.