add paperclip and aws gems to Gemfile
add paperclip settings to prod env
add zipfile attachment to submission model
submission controller saves posted zipfiles.
add test zipfile to fixtures
Merge branch 'master' into uploadToS3

Conflicts:
	Gemfile.lock
Merge branch 'master' into uploadToS3

Conflicts:
	Gemfile.lock
Merge pull request #4 from cyrusinnovation/uploadToS3

Upload to s3