Added structure for testing most ARCs and most publications in testGame.c

I'm not sure how the rest of the file works so I didn't implement it incase one of the other functions needs to be used to do things.
Added int casting to size_t longs to silence warnings that it was losing the precision of the longs
Added tags to structs

Technically our structs should start with lower case letters because they aren't abstract, however I understand the need to differentiate from the other structs already defined in game.h. Perhaps there is another way?
Split student count struct out from the University struct since we aren't allowed to define structs in structs