Plexer: Changed to work with pin mapper
Added TestCounterSim class.  Simulates a 4-bit counter.  It works! :D
Plexer: Now compatible with pin mapper and sim
Mux: Fixed incorrect getName()
DisplaySevenSeg: Added getNumber() for debugging
Simulation: Fixed isLevisable() returning false negatives.
Renamed TestCounter to TestFlipFlopJK
Removed TestGate.  No need for this to exist anymore.
Net: Added getConnectedActives()
Simulation: Added getIslands()
PinIo: Added getPins() to the interface.
Bbox2: Removed useless old method
Compacted interface declarations
Util: Added overload for createIdentityHashSet() that populates the set
Net: Comments
Added Island class to sim
Simulation: getIslands() now uses Island class
ComponentActive: Now implements getPins()
Added SourceOscillator class
Added Blackbox class