Password reset

What if
* you use the SAML authentication,
* there is no local login,
* you dont have email to use Forgot email feature,
* you dont remember your original (not IdP) client password,
and you want to get new password?

This is a password reset function in Personal Settings menu.
![owncloud](https://cloud.githubusercontent.com/assets/3406217/5354052/f8aeaa98-7f82-11e4-8a48-104ed03fb4e4.png)