qmlexperiments: Add Date experiment.

Didn't know that Javascript has a Date type. But then my only contact with
javascript has been from skimming Douglas Crookfords "Effective Javascript".
That was written before version 4 of the EcmaScript standard and Qml uses
version 5.

Still need to figure out the difference betweeen:

    var x = Date();
    var y = new Date();

How do I create a Date object that is initialized to something else than the
current Date? Is this the only way?

    var date = new Date();
    date.setTime(x);
Store dates in db and display in notes.

Need to decide where to do the conversion from the db format to the Note
format.

The timestamp is stored as an integer, but I need to use the Javascript Date
type in order to render a date string.

Where do the conversion?
* In NoteModel?
* In NotePanel?
* In Note?
qmlexperiments: Experiment wit js introspection
Don't specify index for sql insert queries.
dannotes.pro: Add missing qml file.
qmlexperiments: Add text related testprograms
Ignore QtCreators .pro.user files.
Add two states.

The State functionality looks promising. Will be interresting to see if it
scales when the application grows.

What should be handled by the apps global state? What should be put in the
components?
Add color transition.