Added get_containers_by templatetag
Merge branch 'master' of github.com:opps/opps

* 'master' of github.com:opps/opps:
  Add filter published to object tilter, on generic view vase
  Fix pep8, opps/views/generic/base.py:90:25: E126 continuation line over-indented for hanging indent
  Use object filter in get next and get prev on generic view base
  Create object filter, similar field filter in generic views base
  Fix pep8, views generic list opps/views/generic/list.py:68:1: W293 blank line contains whitespace opps/views/generic/list.py:73:80: E501 line too long (82 > 79 characters)
  Fix #214 - Hide content that is already included in a box only if it is not the pagination list.