added "Compiler with gnu11 or c++11 standart support."
added FRIEND_TEST(GetMinor, Minor1x1FromMatrix2x3)
added TEST(GetMinor, Minor1x1FromMatrix2x3)
cosmetic changes in code like move '&' to a type from parameters in methods and functions
moved out of class Matrix operator*(Matrix<T>, T value)
moved out of class Matrix<T> operator*(Matrix<T>) and isMultiplyPossibleWith(Matrix<T>)
fixed TEST(MatrixIsMultiplyPossible, AllCasesWithVector) because of changes at Matrix.h with moving and isMultiplyPossibleWith() out of class Matrix<T>