upload to s3 rake task; change 'dist' output to list-view*.js

Before files in dist were being generated as ember-dev-package-*.js. Now
they are written as dist/list-view*.js, where the asterisk fills in
prod,min, etc.
Merge pull request #24 from fivetanley/s3-uploads

upload to s3 rake task; change 'dist' output to list-view*.js