utils refactor
cs_cfg changed to class
minor io refactor
part refactor of io and state
refactored some more, mostly io
corrected usage of python reserved terms, import warnings, more io refactoring
split network and raster modes
added python logging
logging changes
created cs_base.py common base class for modules
merged cs_base and cs_util
Merge remote-tracking branch 'upstream/master' into tanmaykm
Merge pull request #4 from tanmaykm/tanmaykm

Multiple refactors done till now. Will take up merging of network and raster modes in next PR.