implemented PEP8 compliance for grid.py
implemented PEP8 compliance for grid.py

git-svn-id: https://svn.zmaw.de/svn/pycmbs/trunk@445 46f1e1ae-ddaa-4461-89cc-888b818d8ef3

Former-commit-id: 936649be2ea98d857e13fdd9e5dd70c15c32b5d4
pygeo/pycmbs,pygeo/pycmbs