Purged SIZE_T with size_t.
Use destroy in place of clear.
Added killTree -- kills all processes in the hierarchy, irrespective of the process stage.
Purged boilerplate from helloWorld.
Renamed forkSim/joinSim as doSim/waitSim.
Simulations need explicit termination in some cases.
Added more functions for running simulation for a specified time.
Added example that illustrates aborting a stage.
Added functions for systemc co-simulation.
Merge pull request #23 from puneet/master

Sync up the latest dev.