+ updated main index.html to point to all experiences
+ did some file reorganization
--HG--
rename : content/select/js/jquery.lasso.js => browser/base/content/tabcandy/app/jquery.lasso.js
rename : browser/base/content/tabcandy/overlay.js => browser/base/content/tabcandy/app/overlay.js
rename : browser/base/content/tabcandy/pixastic.js => browser/base/content/tabcandy/app/pixastic.js