Added comments on Javascript
Partial implementation for define variable screen
Merge remote-tracking branch 'origin/angular' into angular

Conflicts:
	src/main/webapp/WEB-INF/dynamic/js/digitalabs-data.js
	src/main/webapp/WEB-INF/dynamic/js/digitalabs-utils.js
	src/main/webapp/WEB-INF/pages/angular/angularDefineVariable.html
	src/main/webapp/WEB-INF/pages/angular/angularOpenSheet.html