Support JSON manifests and manifests with randomized filenames
Don't assume we have a manifest in the updaate_asset_mtimes task, because it's run before the precompile task
Sync randomized manifest filenames between servers
Cache manifest path
Check for assets:precompile:nondigest rake task before invoking it during rollbacks, because Rails 4 does not have nondigest assets
Merge pull request #412 from jimryan/support-json-manifest

Support JSON manifests and manifests with randomized filenames.