version 1.1.2
version 1.1.2

- Spacetree layout rewrite (fixed unbalanced trees issue).
- Layout based on this paper:
  <http://research.microsoft.com/en-us/um/people/akenn/fun/drawingtrees.pdf>

- Reimplemented the getBoundingBox method. (was buggy)

shzy2012/jit,printedheart/jit,printedheart/jit,pingjiang/jit,mcanthony/jit,mcanthony/jit,tim777z/jit,mcanthony/jit,shzy2012/jit,tim777z/jit,philogb/jit,printedheart/jit,pingjiang/jit,tim777z/jit,shzy2012/jit,shelsonjava/jit,shelsonjava/jit,pingjiang/jit,shelsonjava/jit,philogb/jit