Added quaternion skeleton
Added variable structure and basic constructors
Started adding operators
Identity quaternion
Merge branch 'develop' into feature/quaternions

Conflicts:
	build/vs2010/ProbablyMath/ProbablyMath.vcxproj
	build/vs2010/ProbablyMath/ProbablyMath.vcxproj.filters
Add equals to quaternion
Merge branch 'develop' into feature/quaternions
Started adding more operators
Added length
Added more operators
Add quaternion inverse
Added quaternion normalization functions
Made quaternion typedefs consistent everywhere
Added a few more constructors to vectors to help with quaternion and then made them all consistent
More quaternion operators
Added pi constant
Added cos and sin for angle operations
Added operator tests
Inverse and normal tests
Added rotation creation statics