Update sites.json

Added Windows 8, Windows Phone 8 and Blackberry
Added Rdio and Fitbit
Merge branch 'master' of git://github.com/Salax-/DevCenter.me

Conflicts:
	sites.json
Lowercase-ify site IDs
Merge branch 'patch-1' of git://github.com/torvos/DevCenter.me

Conflicts:
	sites.json
Lowercased some site IDs