rename sth
	renamed:    ../SolveAnEquation/Python/GaussSeidel.py -> GaussSeidel.py
	renamed:    ../SolveAnEquation/Python/gauss.py -> gauss.py
	renamed:    ../SolveAnEquation/Python/jacobi.py -> jacobi.py
        renamed:gauss.py -> Gaussian_elimination.py
        and add a wikipeida link