Add back functionality to bread crumbs, still some bugs. Add documentation to JS Trail model

	modified:   app/assets/javascripts/libraries/arrayHelpers.js
	modified:   app/assets/javascripts/orangeproton.mindmap.js
	modified:   app/assets/javascripts/orangeproton.trail.js
	modified:   app/assets/javascripts/request.js
Merge branch 'development' of github.com:pse4/orange-proton into development