Add rudimentary search functionality, to be invoked with JS console, add Mustache gem for logic-less templates

	modified:   Gemfile
	modified:   Gemfile.lock
	modified:   app/assets/javascripts/application.js
	modified:   app/assets/javascripts/orangeproton.mindmap.js
	modified:   app/assets/javascripts/request.js
	new file:   app/templates/_sidebar.mustache
	modified:   config/application.rb
Merge branch 'development' of github.com:pse4/orange-proton into development