Tooltips are now uber cool!

Tooltips are now uber cool!

I always wished tooltips would be less boring, and so we have them all
fancy and nice :-)

 * tooltip theme can request a timeout before hiding. This means we
   can fade out the tooltips nicely.

 * tooltip theme get enough information to track its origin. The
   current theme will show a small tip where it was created, and
   dynamically follows it. The graphics kinda suck, but I tried to
   achieve a cartoon-like buble using Inkscape.

 * label style is set to "tooltip". I'm providing a default with
   dark-gray text and 8 as size.

SVN revision: 52166