Labs disclosure stuff for issue #18

Per Labs ToS, we need to display the following text on the public request page and the user registration page:

```
By creating an account in this project and/or using other wmflabs.org Services, you agree to comply with the Terms of Service for wmflabs.org Services and acknowledge and agree your IP address will be made publicly available and not be treated as confidential regardless of whether you create a user account. You also agree that Labs volunteers will have access to any data you submit. This can include your IP address, your username/password combination for accounts created in wmflabs.org services, and any other information that you send. Labs volunteers are bound by the Labs Terms of Use, and are not allowed to share this information or use it in any non-approved way. Since access to IP address and other information if fundamental to the operation of Labs, these terms regarding use of your data expressly override the Wikimedia Foundation's privacy policy as it relates to the use and access of your personal information.
```

Moved those two commits here instead, as we a) probably don't want this on the toolserver yet, and b) possibly ought to have a config option or something for now, though we may not want to be able to disable it when we move to labs. 

Ideas?