Merge pull request #1 from AndreaCattaneo/develop

fix permission check
Merge branch 'develop' of ssh://github.com/Sintattica/atk into develop

# By Andrea Cattaneo
# Via Andrea Cattaneo (1) and lcamozzi (1)
* 'develop' of ssh://github.com/Sintattica/atk:
  fix permission check
 Added "reverse_attributeaccess_logic" global configuration variable
Merge branch 'develop' of https://github.com/Sintattica/atk into develop

* 'develop' of https://github.com/Sintattica/atk:
  Added "reverse_attributeaccess_logic" global configuration variable
add support for nested forms ( used in atkOneToManyRelation with flag AF_READONLY )