Added demo solution from week 6
Added demo solution from week 6

reykjavik-university/2014-T-514-VEFT,reykjavik-university/2014-T-514-VEFT,fannarx/2014-T-514-VEFT,reykjavik-university/2014-T-514-VEFT,reykjavik-university/2014-T-514-VEFT,fannarx/2014-T-514-VEFT,fannarx/2014-T-514-VEFT