Manage profile updates

This is a minor update/house cleaning PR for the manage profile page of the current user.

Trello card: https://trello.com/c/mn1fSBHG

Three little updates to the users profile:

1. add a link to manage profile in the user nav, looks like:
  ![manage_profile_dropdown](https://cloud.githubusercontent.com/assets/928367/2631854/07fbeb3c-be5e-11e3-964f-ff4d41918aa0.png)
1. remove the password tab from edit profile because users now manage their passwords with chef/oc-id
1. remove email and name fields from edit profile because users now manage their name and email with chef/oc-id

We should add information and a link to the edit profile page pointing users to chef/oc-id for managing their account information. Heck, that link could even sign them out so the next time they sign in it automatically updates in Supermarket. Anyways, I think that is something we can in the future (I created a Trello card for it).