GPII-752: Add status messages to allow the user to know what's happening in the system

This pull requests adds status messages for:
 - Saving and thus logging in (PMT)
 - Loggint out in PMT
 - Saving and Applying in PCP
 - Making a change in the settings in PCP
 - Logging out from PCP

Currently, with this pull request the whole workflow of PMT & PCP is being described with short status messages.

It was decided in the comments of http://issues.gpii.net/browse/GPII-752 that the status messages will move along, in parallel with the functionality of both panels. Once another functionality part is added, the issue perhaps should be reopened to reflect the functionality improvement with another message.
@jobara I'm afraid I don't see much point in using `fluid.allocateSimpleId` for this. One way or another, we'll need to have an option/member holding an id for the element, which the prefsEditor will add on `onReady` event. We could create the member you mentioned, which will use `fluid.allocateSImpleId` to obtain this id from the dom element - but the prefsEditor component will already have this id in the options, so why should it look again for something it already has?

I guess this would make sense if we're having a hard coded id for the element in the HTML and thus `fluid.allocateSimpleId` can get it. But since we're adding the id "dynamically", there's no need to "dynamically" obtain it once again.