Packaging MountEFI

[jrjsmrtn]

I refactored MountEFI for packaging using setupmeta.

It can be installed using:

$ git clone https://github.com/jrjsmrtn/MountEFI
$ cd MountEFI
$ pip install .

Or, if uploaded to PyPI:

$ pip install --user MountEFI

I added two console_scripts entry points so it can be invoked as:

$ MountEFI

or:

$ mount-efi

The MountEFI.command is still in the repo, so it can copied from a git clone and double-clicked.

---

I added two features:

1. a --settings option to specify the settings.json location;

2. if not specified, the settings file will use the XDG convention by default:

   /Users/${USER}/Library/Application Support/MountEFI/settings.json

   To do that, I added a dependency to the appdirs package.

I removed one feature:

• if MountEFI is published through PyPI, there is no more need for a self update feature.

---

I kept individual commits in the PR so you can more easily examine my changes. If this PR is ok for you, I will rebase as one commit.

[jrjsmrtn]

Two files are still missing for packaging:

• LICENCE.txt

  I have no idea what is your licence :-)

• classifiers.txt.

  I found some Windows support in the code and I am not sure which Python versions you want to support, so I have not yet added classifiers.

  Do you still want to support Python 2.7 ?

It would also be useful to tag versions before/if it's released on PyPI.