snapshot
now properly rendering only when needed
now properly rendering only when needed #2
Most of the annotation work is there.  Need to clean up color, selection only rendering and download window updates.
XML fallback path now working nicely.
add manifest.json for integration with vulcanforge visualization framework
Fix up the loading messaging for annotations.
Merge branch 'master' of https://github.com/wgaggioli/cad.js into wgaggioli-master
Merge Laszlos changes
Clean up render on load issue.
Update cad.js to integrate into the vulcanforge visualizer framework. The following steps were necessary:

- update all urls to point relative to the file rather than the application root (e.g. /javascript/cad.js  ---> javascript/cad.js)
- add the visualizer utility file visualize.js and use that appropriately
Merge branch 'master' of https://github.com/ghemingway/cad.js
Clean up a render issue on zoom.
Merge branch 'master' of https://github.com/wgaggioli/cad.js
Fix invalidate issue with tree selection and bounding boxes.
make sure three is loaded before initializing page
add python version of xml to json script
Merge pull request #3 from wgaggioli/master

XML to JSON python script and require loading dependencies
Fix NaN bug in downloads window.
Better JSON indexing.