multithread

[chuck1]

Prerequisites:

• get PhysX working (iss8)
• make all external-to-class data access via-function and make data members private (or protected)

Two main threads to start:

• render
• simulation

This task will be a major undertaking:

• the main loop must be split
• all data access across thread boundaries must be thread safe

[chuck1]

tried making two loops, one rendering and one doing physx simualtion. The render loop (launched my first thread), didnt run much. Perhaps too many other threads already running (boost asio ioservice, physx simulaiton?(look into this))

[chuck1]

NOTE branch named after this issue switched to #49 and then to #54