Partial pick: Added `fullname` property to user profiles

Ideally this should be handled at the DB level by having a single
`fullname` field thus removing the culture-specific `first_name` and
`last_name` fields.

Pick notes: Picked the bit we didn't have.

Conflicts:
	pootle/apps/pootle_profile/models.py
Append current location hash to login redirect URLs

Fixes evernote/pootle#17.

Conflicts:
	pootle/templates/layout.html