Draft on GSettings Port for blueman

Config API Modified to allow schema changes on load
Force python2 Detection on Systems
with python2.x and python3.x installed
Migrate GSettings Schema from apps.blueman to org.blueman
Rename schema files to .schema.xml standard
Rework GSettings.py to use Gio.Settings.new for settings with no
specified path

TODO:

* Testing
* setup auto install for xml files
* remove old File and GConf Support