Merge pull request #61 from melver/master

Provide Version fix when project is copied to foreign Git repository
Made version.py optional and added support for moving the .py files outside of the param package.
Minor rewording
Added abbrev() method to get simplified string representation
Set documentation version string automatically from project
Added 1.2.1 release notes and updated declared version
Minor clarification
Added numbergen.__version__
Added numbergen to manifest