Add Khan Academy and Duolingo

Signed-off-by: Matheus Macabu <mkbu95@gmail.com>
Add Khan Academy and Duolingo: Fixed ident
Added Desktoppr.co
Trello Added
Update sites.json with "Soundcloud"
Update sites.json
Added Xobni
fixes #63
Merge pull request #66 from jbrooksuk/patch-1

Merged Desktoppr.co
resolved conflict
Merge branch 'scottydelta-master'
resolved conflict and removed Trello entry as it already exists on JDM
Merge branch 'mauris-master'
fixed conflict and removed trailing comma
Merge branch 'LeGaS-master'
Merge pull request #68 from racfm/patch-1

Merged "Soundcloud" into sites.json
Corrected spelling of codecademy
Merge pull request #73 from staeff/patch-1

Corrected spelling of codecademy
Chrome header bar and feature
added jquery scrollTo for banner to feature