Upload non-fingerprinted version of updated assets

Altered filtering for keeping files to exclude non-fingerprinted files from being kept since they get updated too on asset compilation and thus need to be uploaded (useful for outside app references to assets)

For example, we have a case where we need to reference an image by the non-fingerprinted name (e.g. image.png) outside the Rails app, so it would be nice to just reference the S3 link. However, when the designer updates the image and has the asset_sync upload to S3, only the fingerprinted version goes out (e.g. image-82389298328.png). This diff fixes the problem by uploading the updated non-fingerprinted version of the image too.