Add alert option.
Properly stub intitalizer in specs.
Follow file name convention.
Wrap native Audio object.
Add appcache creation rake task
Remove i18n.js and Select2.
Run `rake appcache` after assets are precompiled.
Include application manifest.
Typo--.
Restore the stub.
Restore i18n.js
rake i18n:js:export
Safely wrap `Audio` and replace with a dummy if not defined.
Add empty manfist for test- and production environments.