Update README.md

Added Tanmay as author, fixed links.
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
separated focal point handling into a class
merged network and raster modes.
moved all modules to common scheme.
had to change the names of output files to make things uniform.
fixed GUI, stress and verify_large to work with recent changes
fixed setup routines & makefile for recent changes
fix wxversion selection for windows (possibly older version)
Merge pull request #7 from Circuitscape/tanmaykm

merging all refactors from branch to master
Have a common version file.
Versions still have to be bumped by hand in Makefile and .iss files.