Minor fix to sponsor missing from the site restructure

Add a Google Maps property to Site Settings Patch by: Lennard de Rijk <ljvderijk@gmail.com> Reviewed by: Sverre Rabbelier

Fixes to {Site,Home}Settings Also improved help text on HomeSettings partial_path and link_name.

Fixing the string for the default home page

Making the docs template prettier

Allowing + and - to be clicked in the menu

Fix not working former_ids. Add support for "Invalid accounts". Now when id from former_ids tries to create a profile "This account is invalid." error message is displayed. Compare emails in lower cases to prevent changing User email to the same email with different character casing (needs some more testing). Patch by: Pawel Solyga

Some indention fixes and remove not needed variable in soc.logic.models.base module. Patch by: Pawel Solyga

Refactoring of {site/home}_settings to make them use base.View This makes the way for deleting the key_name.py module

Major site restructuring, also deleting of many unused or obsolete documents The new structure is as follows: <entity>/list - list all <entitie>s <entity>/create - create a new <entity> <entity>/show/<key fields> - public page for <entity> <entity>/edit/<key fields> - edit a <entity> <entity>/delete/key fields> - delete a specific entity