Bulk commit, please bower update.

- remove common dir anti-pattern
- remove app.Store anti-pattern
- isomorphic 404 and 500
- remove storage from este.Routes, it was SRP violation
- clean and update many comments
- clean formatting
- update app externs
- .component instead of .create for React wrappers
- {} instead of null for React props.
- fix several bugs
- add userStore.activeSong
- rafactor server
- cleaner architecture