Support folder renaming

[mariocj89]

At the moment when a folder is renamed locally, gitorg will report it as added and the original. Support some way to enable this.

As an example gitorg add github:python brings you locally all repositories from the python org. If you rename peps repository to python-pep gitorg will report it missing.

Solution: Explore the option of getting local names from the default git remote rather than the name of the folder. In the previous example, origin will still be python/pep

Reproduce:

gitorg init
gitorg add github:python
mv peps python-peps
gitorg status  # This will now report peps as missing