Added test class
Changes as of 10/10/14
- Fixed some errors related to vector/matrix size
- Redesigned vector/matrix multiplication for row/column vectors
- Added easy conversion from Matrix/Vector to subclasses (via constructors)
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Changes as of 10/16/14
- Changed some exception throws to more suitable ones
- Changed Matrix constructor to not set identity
- Reorganized existing matrix methods
- Added matrix inverse operation & the others needed for it.
- Optimized some matrix functions