Fixes #10
1. Rename module from wp-admin to wpadmin due to errors in the build process.
2. Add license to wpadmin.py
3. Remove starttheme and startplugin from within a class to standalone functions since they were staticmethods anyways.
4. Refactor main
5. Convert README from markdown to rst.
6. create setup.py
Merge pull request #11 from raulchacon/issue#10-pip-install

Fixes #10