Shell region now has triangle, but we might need to go down a different path.
Unfortunately, setting a non-rectangular region for a Shell in SWT results in really jagged edges.
You can even see this (now that I look closer in Snippet 285 and 134) in SWT sample code. I'm going to look into
drawing everything with a GC to see if we can get more attractive results.
Merge branch 'bubbleTooltip' of https://github.com/ReadyTalk/swt-bling into bubbleTooltip

* 'bubbleTooltip' of https://github.com/ReadyTalk/swt-bling:
  better, sorry... damn you git!
  Needs tests... working on it!