Displaying of labels inside overlay with regex.

- Using old regex by word methodology.
- Better in a lot of respects, gets everything.
- Putting labels in Overlay I think is much better / cleaner.
- Much less code, properly leverages pixelPositionForBufferPosition.
- On way to handling various editorViews.
- Working jumps with current editor hard coded.
- Keys continued across views.
- Closes #7.