Port to plain JS
Added a tree visualizer for the dock tree to help with debugging
- ignore margins on content (was causing content DIVs to be incorrectly placed)
- fix TabHost width/height around the wrong way - oops
Merge branch 'master' of https://github.com/filmackay/dock-spawn
Cleaned up parts of dock tree visualizer code
Merge pull request #7 from filmackay/master

Port to JS