updated api spec to not break, updated todo list, began user model and spec
generated user model with specs
created user#create route in controllers
created user#show action
added passport
created authentication with passport; changed user show to use username attr
created current session logic, added hogan, rerouted index to show template, started splitting off signup and login
cleaned up server routes by splitting off auth and index routes; also renamed routes to controllers
updated routes for login and signup on backbone side
updated user controller to fix tests (redirect on create action)