Time to shake things up a bit!
Add the beginnings of a new theme with much simpler playlist elements, new sliders ( volume and progress now use the same svg elements ) and otehr elements.

All of these are work in progress, and most are not tinted yet. ( and some I am still very much discussing with leeo! :-)

What is really the main point of this commit is to move all elements into one big annotated svg file sinstead of having elements spread out all over the place.

Hopefully this will make it eaier for artists to contribute.

Also, with the new shared renderer, this should actually speed things up quite significantly!