Collective.geolocationbehavior

----------------

- Install the plone.formwidget.geolocation default profile in order to get
Leaflet map support.
[thet]

- Fix upgrade step with broken persistent classes and re-create BBB class
definitions for upgrading. Reindex the object while upgrading to get updated
object_provides indexes.
[thet]

------------------

- Fix the import bug, introduced of previous commit.

------------------

- Fix import of GeolocationField.

----------------

- Remove browserlayer, which isn't needed any more. Includes an Upgrade step.
[thet]

- Switch to Attribute storage instead of Annotation storage. This is easier to
access and needs less ZODB unpickling. It's unlikely that two behaviors share
the same geolocation schema name. A upgrade step is provided.
[thet]

- Removed code related to Google Maps integration. The integration is better
done with Mockup Javascript.
[thet]

- PEP8.
[thet]

----------------

- Add italian translation
[gborelli]

- Remove dependency on Products.Maps and copy some of it's interfaces to here.
Note, Google Map integration is not available at this point.
For mapping functionality I suggest to backport the Leaflet integration from
collective.venue.
[thet]

- Remove dependency on Grok and use Dexterity 2 way with plone.supermodel to
define the schema.
[thet]

--------------------

- 1.1 was somehow broken again