Added Gmock BDD aliases
Added test in System spec to make sure process things is not called more frequently than every 20 ms.
Updated dependency injection sandbox test.
Simplified model to make introducing gravity unit tests easier - removed air drag.
Added test cases for basic gravity.
Fixed missing smash man.
Updated OS target to 10.8.
Renamed referenced mock library to libgmock-static.
Started adding in air drag test cases.
Fixed broken gravity test.
Started bounce spec.
Moved gravity and bounce specs into individual files to reduce clutter.
Corrected formula for working out distance after gravity.
continued work on smashups.
smashup spec changes