Completes Customer full view in frontend app.

* Adds base Transaction views to be rendered on each model.transactions
  instance from calling /api/customers/:id
* Adds empty Badi.Entities.Transaction and
  Badi.Entities.TransactionsCollection
* Fixes routing problems.
* Adds routes for signing up from the API.
* Edits links on frontend to avoid collisions from uninitialized
  controllers on rails.
* Adds accounting.js and moment.js to help format timestamps
  and currency.