the permission codename is created as "can_view" instead of "view_xxx"

[johnnydobbins]

the permission codename is created as "can_view" instead of "view_xxx" where xxx is the object name.

See how django creates the permission here:
https://github.com/django/django/blob/master/django/contrib/auth/management/__init__.py#L18

The current method of simply having the codename as "can_view" makes using the codename for has_perms unusable.

This should be change to follow the 'django way' of creating permission codenames.

Also need to consider how to update existing codenames.

Example:

| 127 | Can add author                     |              39 | add_author                  |
| 128 | Can change author                  |              39 | change_author               |
| 129 | Can delete author                  |              39 | delete_author               |
| 130 | Can view author                    |              39 | can_view                    |