Change all choices attributes to select2
add image property export
fix blank lines
Update AttributeCleanerSpec.php
Merge branch 'master' into feature/image_option_export

* master:
  removed spec
  Yoda style check to avoid null assignment
  add category not mapped exception
  fix on configurable export
  handle category without root mapping
  little fix on attribute mapper
  fix magentoAttributeMapper
Merge branch 'feature/image_option_export' of git://github.com/akeneo/MagentoConnectorBundle into feature/image_option_export

* 'feature/image_option_export' of git://github.com/akeneo/MagentoConnectorBundle:
  Update AttributeCleanerSpec.php
  fix blank lines
Merge pull request #195 from akeneo/feature/image_option_export

Feature/image option export