Instead of using LooseVersion from distutils (a missed deps btw), I switched to
a custom version not directly based on tuples comparaison. Because it doesn't
support different type inside tuple.

All my package are currently passing better than with LooseVersion.

We also doesn't compute the full sorted list of versions but only the max, which
is the last.

This will avoid to run make every time a fix is provided in archversion (dev only)

This is not the same behaviour of argparse than in 2.7 python. I guess
there is a bug.

I guess I missed to finished moving BaseConfigFile class to a child class
of OrderedDict instead of havind a method config.

Also add README.rst into PKGBUILD example

This avoid opening README.rst for free

Instead of having all tools into one arch tools repository, split into
sub autonomous project.