Many parallel wips

* show/hide BBox
* new xtk version
* reslice on/off
* live reslice
* works even if no JSON
* fancy tree destroyed
* better fancy tree object creation
* fix bug in .chris.json creation

TODO: fix leaks!!!
Merge branch 'TIDO' of https://github.com/FNNDSC/chrisreloaded into TIDO

Conflicts:
	plugins/viewer/widget/js/viewer.js