Adding signal for pre post squad creation for admin and member groups.

Assign permissions to groups post save.  Tests added for member and admin user permissions via guardian.

Adding form and view for creation.
Adding signal for pre post squad creation for admin and member groups.

Assign permissions to groups post save.  Tests added for member and admin user permissions via guardian.

Adding form and view for creation.

Adding created by attribute to squad model.

Adding detail view and basic styling.