Swordfish components plugin

Move all the models stuff into a QML plugin and add a simple component
to test the PlacesModel.
Merge branch 'gio' of git://github.com/hawaii-desktop/swordfish into gio

New plugin to show sowrdfish has been added
Mount class method now return QIcon
Volume class's method getIcon() now return QIcon
Updated the method to receive the Icon
Code cleaned
connect method has been commented out due some errors
QObject::connect: Incompatible sender/receiver arguments
Need to change Mount's class name to ItemMount
Need to change Volume's class name to ItemVolume due conflict between Kommodity::GIO::Volume and Kommodity::GIO::Mount