Added degree <-> radians conversion functions
Added files for plane class, quad class and intersection algorithms
Adjusted test cases for changes in source files (removed orientation and memory layout template parameter from vector class and matrix class)
Removed unnecessary typedefs
Moved intersection methods into separate file
Added folder and files for loading/importing meshes into memory
Added new test cases for quaternions
Massive changes:
Removed memory layout template parameter from matrix class.
Removed unused orientation parameter from vector class.