MDL-30740 skydrive: Add filepicker navigation bar

In order not to get lost in the Sky.

We use a session cache to reduce repeated calls to the skydrive API,
storing the folder name each time we get a listing.

Original concept from Ruslan Kabalin, thanks!
MDL-30740 skydrive: bump version for core inclusion

Remove release name and maturity as these will now be inhereted from
core.