implemented first version of file listing for dpkg env.
Added test for full output
Removed filesize from File Payload tag
Added YUM file Payload generation via rpm -ql
Changed file structure. Added sample output dumps from yum

The application now uses relative imports.
To invoke main type:
$ python -m swidGenerator.main
Removed camel case from module name
Removed unnecessary test. Fixed some PEP8 style issues
Added directory listing of /usr/share/man from fedora system
Removed author tag, Changed autodetection to use relative imports, Changed module name swidGenerator to swid_generator
Moved command_args from class level to method, Changed environements to use relative imports
Removed explicit whitespace split ' '
Changed main.py to use relative imports
Changed import to sys
Updated README invoke section
Changed is_file to use stat function
Changed is_file method to use stat on file
Added docstring to is_file method