Refactoring, code cleanup, etc.

The main goal is to have vfeed in pypi, in order to achieve that I needed to change "lib" to "vfeed", move files around inside the module, rename the "updater" to something less generic (in the future if we deploy with pip install vfeed, other tools might have also a updater.py and the user won't know what he is calling).

Lots of other changes, please review them and merge into the vFeed project. If in doubt about any of the changes don't hesitate to ask.