New click function for buttons

still needs some work
Updated main.js
Fixed Backend functionality
fixed store, need to change to OO
changed backend to Singleton object.
usage: 
var backEnd = new Backend();
backEnd.Settings.set("name", value);
var nextquestion = backend.QuestionGenerator().getQuestion();
Added logic, fixed answer
Removed comment
Merge branch 'master' of github.com:martelit/arcada-projekt
added front/helper.js, refactored a lot