Updated changelog
Introduced support for wicked. Adapted to changes in NetworkService API
ManagedStore: refactoring
Separated restart network confirmation dialog into own class.

The dialog is displayed only during installation when virtual proposals
are in game (it happens when installing VM host)
Removed/replaced NetworkService.EnableDisable calls
UI accepts selection of only currently installed network backends.
Updated rpm spec
Merge pull request #119 from mchf/wicked_support

Wicked support