[feature] account-settings-password

# Purpose
Currently, there is no clear way for a user to change their password. The current mechanism/workaround is to instruct the user to use the Forgot Password dialog on the main login page.

Closes Issue CenterForOpenScience/openscienceframework.org#245

# Changes
Adds a side navigation menu to the User's Settings named Account Settings and from this page the user can now change their password.

![image](https://cloud.githubusercontent.com/assets/3111541/5018591/09e0ef90-6a86-11e4-89af-480e80fe081e.png)

The following validation errors can be encountered.

![image](https://cloud.githubusercontent.com/assets/3111541/5022479/3e989a20-6ab4-11e4-8c5a-745754267911.png)

A successful password change should be indicated.

![image](https://cloud.githubusercontent.com/assets/3111541/5018657/b5f78028-6a86-11e4-9099-f6129c59eac7.png)

# Side Effects
Renamed the header of the Profile Information page to "Profile Information" it was incorrectly set as "Account Settings".

![image](https://cloud.githubusercontent.com/assets/3111541/5018584/f43aaabe-6a85-11e4-833f-9b20cbf20691.png)

Our methods should avoid implicit `save` calls.