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
When a user access the tasks under a project by going to project/project/[project_id]/task , the user can add a task under that project by clicking on the 'Create Task' button, given that the he/she has the permission. 

With projects enabled for tasks (settings.project.projects = True), if the user creates a task from within a project, a project field appears, which is not set to the current project. I wanted to make this field non writable and default to the current project.