Initial Plasma Wiring

Does nothing fancy at the moment other than start the Bullet Simulation Mgr and open a log file

Build:
CMake updated to look for bullet - watch out for manually defined path for bullet in root CMakeLists.txt
Minor change to prepare_env.ps1 to find the DirectX SDK

Code:
Initial Creation of plBTSimulationMgr
Initial Creation of plBTPhysical
plBTPhysical::Read created
wired plClient

Status
plClient - Currently building