Minor fixes and updates

• Upgraded jsTree used in a demo to v.3.3.4
• Removed the grunt-contrib-imagemin dependency as it has an ongoing issue that obstructs the npm install process
• Added a Font Awesome support demo

Adding bower support

1.0.1

Update bower.json

jsTree 3 Bootstrap Theme

jsTree Bootstrap Theme upgraded to support jsTree 3. Legacy version is available on a separate branch: https://github.com/orangehill/jstree-bootstrap-theme/tree/Legacy_jsTree_Bootstrap_Theme_(for_version_pre_1.0_fix2)