Catch autodiscover module import error
Merge branch 'release/3.2.3' into develop

* release/3.2.3:
  Bump the version to 3.2.3.
Deprecate `imagekit.processors` submodules

- `base`, `crop`, `resize`, and `utils` are now placed in `pilkit` app
- remove magic compatibility between `imagekit.processors` and `pilkit.procesors`
Merge branch 'processors-deprecation' into develop

* processors-deprecation:
  Deprecate `imagekit.processors` submodules
Merge pull request #291 from danxshap/import_fix

Fix a Django 1.7 issue with importing INSTALLED_APPS modules
Bump the version to 3.2.4.
Merge branch 'release/3.2.4'

* release/3.2.4:
  Bump the version to 3.2.4.
  Deprecate `imagekit.processors` submodules
  Catch autodiscover module import error