anchor.diff:  Deprecation policy
   ~~~~~~~~~~~~~~~~~~
   
  -At any momment of time, django-pgjson developers will mantain support for two versions of django.
  +At any moment of time, django-pgjson developers will maintain support for two versions of Django.
  
positive.code: Now `data` attribute works like python standard dictionary.
  
  WARNING: PostgreSQL json field also can store arrays and any json valid value
  but, django_pgjson at this momment only handles python dict.
  
  
  Querying
  
negative.code: ----
  
  
  NOTE: At this moment, with PostgreSQL 9.3 as last stable version there is only a
  limited set of native operators for json type. When PostgreSQL 9.4 is released,
  more lookups will be added.
  
  jsonb containment lookup
  ^^^^^^^^^^^^^^^^^^^^^^^^
  
  If you are using Django 1.7 and PostgreSQL >= 9.4, you can use the special jsonb
  containment operator, which can be accelerated by a GiN index on the jsonb
  field.
  
  