FilesPipeline which enalbes to download any files.
It has been extracted from ImagesPipelines.
ImagesPipeline is built on top of FilesPipeline and consist only with convert image and thumbnail generation logic.
Test reorganization and new tests for Files and Images Pipelines, PEP8 changes in MediaPipeline
typo
remarks
typo
backwards compatibility: image_key
backwards compatibility: image_key & image_downloaded
after additional tests with actual s3: k.set_contents_from_string is working
Merge pull request #370 from loucash/master

FilesPipeline extracted and separated from ImagesPipeline