ParallelNode implemented, ParallelScheduler really, really incomplete
Merge branch 'master' of https://github.com/Bitidork/switch-scheduling
Merge branch 'master' of https://github.com/Bitidork/switch-scheduling
Removed ParallelNode, since all it basically did was implement VOQs
which are now handled by the tag and switch classes. 

Revamped ParallelScheduler. Now extends VOQScheduler and implements the
createProgram method. Haven't tested it myself, but the logic is there
and correct as best I understand it.