Commit worth some days of work, while I was away. Here goes the most important changes:

* Added a KRunner that allows to change the current profile ("set-profile")
* Added a basic Applet. This is meant to be a placeholder, since I'm not good at all with Plasma Applets.
* Improved the Plasma engine, now it has all the needed informations.
* Added more methods/signals to DBus interface, mainly for the Plasma stuff.
* Improved profile support
* Some changes to the GUI in the config dialog
* All powerdevil modules are now ready for l10n. Added also Messages.sh. All the modules are translated from "Powerdevil" catalog.
* Added a "capability" page to the KCModule, where you can see what your system is capable of
* Added support for powersaving schemes
* Added support for turning off CPUs (where possible)
* Added more notifications
* Various fixes, and some more stuff I could have forgot writing about