Fixes:

- Use DRF ImageField, not FileField
- Ensure that permissions get updated correctly in 'test' mode
- Allow file upload in the APITester class

.gitignore

@@ -35,6 +35,9 @@ local_settings.py
 *.backup
 *.old
 
+# Files used for testing
+dummy_image.*
+
 # Sphinx files
 docs/_build