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
Added BlackBoxPin class