Rename CLI & Python module to fedmod
- modularity & modtools are both overly generic
- modulatiry & modtools are both claimed on PyPI
- fedmod is short for "Fedora Modularity"
- fedmod used a similar naming style to fedmsg and fedpkg
- fedmod is available on PyPI
Also cleans up an issue where the packaged script would
have conflicted with the generated entry point by instead
making the package executable with Python's `-m` switch