Fix EOF problem using S3BotoStorage -- refs #21 #26
Add supported storage engines to README -- refs #21 #26
merge with https://github.com/centralniak/django-ckeditor/tree/feature/storages_by_riklaunim
fix upload_path from test_settings.py
update ckeditor to version 4.2.1 with all languages
update readme
fix readme.rst and update version to 4.2.1
Merge remote-tracking branch 'snbuback/master'

Updates ckeditor widget to 4.2.1.