added parameter epsilon for function areAlmostEqual()
at operator==<double>() added EPSILON_FOR_DOUBLE_COMPARISON to 3rd parameter at call of function areAlmostEqual
at function getInvertedMatrix added 3rd paramter, EPSILON_FOR_DOUBLE_COMPARISON, to call of function areAlmostEqual()
added +TEST(getInvertedMatrix, MatrixWithDeterminantAlmostEqualsToZeroCantBeInverted)
added TEST(MatrixOperatorPlus, OperatorPlusIsComutaive), TEST(MatrixOperatorPlus, OperatorPlusIsAssociative)
just cosmetic changes in tests to fit code to 80 symbols