Add bookmarks to place in front page

[MaksVasilev]

FR: Admin in manage page add bookmarks to any place with coordinates, zoom level and name. Users can see this bookmarks in frontpage (selectlist, tabs, plain list...) and can fast jump in map to place of bookmark or use URL like as http:///place/<bookmark_name>

[bodacea]

I've added this to the V3 features wishlist at https://phabricator.ushahidi.com/T589; please feel free to continue working on this for V2.