*[mom2d] Refactoring Smn
*[mom2d] Refactoring RLCG and Smn
+[mom2d] Smn.iterative()
+[mom2d] RLGC.update() with using Bi-CGStab iterative method
intermediate
intermediate
+[mom2d] class Matrix()
intermediate
+[mom2d] L and C calculation update
*[mom2d] Classes Smn and RLGC refactoring