Bug#132: Adding bulk of tasks
Smallfix: Change wrong related name of the field assigned_to in the Task model
Now a user story can be assigned
US 41: Task #100: Add fields to activate and desactivate kanban and backlog
US #50: Return neighbors when fetching an US/Issue

The response for an UserStory/Issue now contains:

{
    ...
    "neighbors": {
        "previous": {
            "id": ...,
            "ref": ...,
            "subject": ...
        },
        "next": {
            ... same as above
        }
    }
}

If there's a neighbor missing the response will contain the empty dict {}:

{
    ...
    "neighbors": {
        "previous": {},
        ...
    }
}

Neighbors are looked up applying the same filters defined in the
corresponding ViewSets and the same ordering defined in those filters or
ultimately, in the model's meta. In other words, using the same params
you use to filter the object list, can be used to filter the neighbors
when fetching the object's details.
Merge pull request #28 from ikame/master

US #50: Return neighbors when fetching an US/Issue
Fix neighbors fetching in user stories

* Order the received queryset if it doesn't have ordering.
* Do not order UserStory model by "ref" because the query:
  `queryset.filter(Q(project__gt=1) | Q(order__gt=2) | Q(ref__gt=26))`
  give the wrong result. We need to use the query:
  `queryset.filter(Q(project__gt=1) | Q(order__gt=2))`
  because in SQL there's no short-circuiting.
Merge pull request #29 from ikame/master

Fix neighbors fetching in user stories
US #50: Neighbors nav for taskboard and kanban
US#56 Task#111 Adding salt to back
Adding fields to enable/disable wiki and issues
Adding permissions list service
Adding name to permissions list service
Removing some permissions on listing and on default permissions of default roles
Move settings to project repo root path.
Fix .travis.yml with new settings location.
Fix test help text on settings.
Merge pull request #30 from kaleidos/settings-move

Move settings to project repo root path.
Add comment for auth view method.
Activate async emails