Merge pull request #4 from avifoxi/assets-troubleshoot

attempting aws s3 setup, adding long links
adapting lessons from aws tutorial, update gemfile with specific version, and loadign env vars
loading s3 audio.. finally
add AudioAssets controller to hand off requests to s3
add routes to audio ssets controller and parse key for loading
houston, we have contact
routing assets requests to S3 via audio assets controller. functions with local host