divide_row emits more information when things go wrong.
Add checkCondition as place to set breakpoint when test fails.
Utils file for feq function.
1.  Change name of m_values to m_rows in Matrix class.  2.  Add operator== to MathVector and Matrix.  3.  Make use of them in unit test code.
1. Added macro for checking that an exception was thrown.  2.  Removed some output.
Testing of drop_row and drop_collum.  Exception handling for drop_row.
Add exception handling to Matrix::collums.
Fixed bug in determinant calculation.
Add function to create math_vectors from C arrays.  Add tests of operator overloading.
Fix parallel and bad arguments to rotate.