Add js revving.
Added grunt-userevvd.
bring up to date with master
Rev assets in production.
Ignore compiled modal templates.
Ignore compiled modal templates.
Fix link_path on staging.
Merge pull request #133 from optimizely/krush/staging

Fix link_path on staging.
Merge pull request #128 from optimizely/krush/assets

Version control for static assets for caching
resolve merge conflicts in compiled