Changed bug in Assignment1 (checked for first input first)
Merge branch 'master' of github.com:sirmc/voortgezetprogrammeren
Moved changes from Assignment1CleanStart to Assignment1. Removed
Assignment1CleanStart.

Start function still asks for user input. If that would be implemented
in another function, we would need to return an array of sets or make
the IdentifierSet variables global.

Changed the coding style of the check in IdentifierSet's equals function.