Added association between student and test model
Changed association between student and test so its more correct
added seed data and formatted json a bit
Added nvd3.js and created line chart using that
fixed issue with turbolinks
Merge branch 'develop'

* develop:
  fixed issue with turbolinks
  Added nvd3.js and created line chart using that
  added seed data and formatted json a bit
  Changed association between student and test so its more correct
  Added association between student and test model