The reason behind this is that we can better control the behaviour
of the underlying configuration modules, such as the case for undefined
options or for quickly fixing other bugs. Another side effect of this
change is that it gets us closer to the moment where we will not
be dependent on logilab.common anymore, which will definitely
make our pytest users happy.
Some parts were copied almost verbatim from logilab.common.configuration
and logilab.common.optik_ext and pylint.config will definitely need
a refactoring and reengineering for abstracting the configuration,
so that we won't use optparse anymore, but that's subject for another
patch.
Also improve a couple of imports and added support for the
old visit_ names. Priority will have the old visit_ names, such
as visit_discard over visit_expr, visit_callfunc over visit_call
etc.
We moved pyreverse.inspector.Project, pyreverse.inspector.project_from_files
and pyreverse.inspector.interfaces. These were moved since they didn't belong in astroid
and they can be better maintained inside pyreverse itself.
This patch calls visit_<node_type> whenever a frame doesn't have a `locals_type`
attribute, most likely because it wasn't yet visited. Closes issue #543.
