profile : edit photo and name

This commit allows the user to edit his name and photo.
An AlertDialog pops up when you click on the name or photo in the left menu.
- VCardUtils implements the methods to load and save the vcard for the local profile
- MenuHeaderView implements the methods to change the name or photo

If a VCard does not exist, loadFromDisk saves a default profile.

Change-Id: I810607d02fbec115329a9e159fe44ebec0736618
Tuleap: #1074