removung unused cmdargs module
adding BOOLEAN_TRUE and BOOLEAN_FALSE enums
docstring fixes and convert.bool implementation
better docstrings
docstring and error message fix
adding tests for convert.bool
adding NONE and fixing doc strings
convert.none implementation
minor docstring update
tests for convert.none
convert.list implementation
tests for convert.list
Merge pull request #21 from pyfarm/convert_tobool

Add convert.[bool|none|list] staticmethods, remove unused cmdargs module.