Better testing and CNO

Compared to 0.1.0

• Added CHANGELOG.md.
• Added cno text file capabilities.
• Added show_version function comparable to pyproj
• Fixed distribution of default cno and cnob files
• Added tests with known simple data, which allows for better checking.
  • testing for unprojected compares to known raw data values
  • testing for projected data uses a known good run
• Improved documentation within distributed package.
• Fixed caching features to prevent re-reading and reprojecting for each draw.