SSF : Overlays on the map; project_project controller changes

* Adding hazard, theme, countries to the deployments form
* Permission to anonymous to create task, contributor role
* Deployments, members overlay on the map
* Inline login form
Hence...the "theme" should be the functionality they use (or the sort of user tasks they are doing with it), whilst the sector could describe the area of /their/ activity where they use the software.

This would give us a good basis for use-case statistics - i.e. see which "modules" (or sets of functionality) are being used by whom and where.