Added Ubuntu One

Ubuntu One is the personal cloud service that simplifies your digital
life. Imagine buying music and getting it delivered to the computers of
your choice. Or synchronizing your files and notes and accessing them
from anywhere. Or consolidating your computer and mobile phone contacts
and safely sharing documents and pictures with them. Ubuntu One can
already do this and more.
Merge pull request #2978 from alebcay/ubuntu-one

Added Ubuntu One