Links to new help docs

[jonnybazookatone]

So I don't forget, the links should point to the new help pages and not older ones. For example, the privacy policy.

[jonnybazookatone]

Privacy policy wasn't correct, terms of service I mean:

http://doc.adsabs.harvard.edu/abs_doc/help_pages/overview.html#use

We should have an upto date one, relevant for the new API.