Basic implementation of Nearby Pages page.

Links, map on the side forthcoming.
Merge remote-tracking branch 'upstream/master' into nearby_pages
Added "Nearby Pages" page.

Added a view that gives a map and list of the thirty pages nearest
to the user's position (from geolocation). Fixes #534
Stubbing out
+ failing tests
Tests now working.
+ links test in travis
Handle pg create/delete + data migration.
Allow variables in {% link %} page tag.
First draft of page-links-page
Link to 'links' from 'info' tab
Nofollow,noindex for links pg
Searching on map + population via OSM.

Not done, but saving work.  Will rebase out Django 1.5 changes
Better OSM lookup.
Fixes #629
Merge branch 'hub' into hub_fabric_deploy_needed
Merge branch 'hub' into hub_fabric_deploy_needed
Merge branch 'hub' into hub_fabric_deploy_needed
Merge branch 'hub' into hub_fabric_deploy_needed
Fixes for fabric provisioning.

Remove 'deb_utils', as we are no longer using them.  Rename
'install_config' to 'config'.  Move some of the management commands
used as part of 'localwiki-manage setup_all' (e.g. 'init_db') into the
fabric provisioning code.