Mark all pages for a deprecated package as deprecated

[alexanderkjeldaas]

When a package is deprecated, it should not be necessary to go to the 'contents' section to see that it is deprecated.

The warning should be at the top of every page.

Here is an example: the following link is the first result for the query 'cprg hackage' on google. The package is deprecated.

http://hackage.haskell.org/package/crypto-random-api-0.2.0/docs/Crypto-Random-API.html

But that is nowhere to be seen, only on the main page:

http://hackage.haskell.org/package/crypto-random-api-0.2.0

See also haskell/haddock#328

[bananu7]

This looks quite similar to #292.

[bitemyapp]

@bananu7 deprecation is quite different from "not latest", but it's a similar idea. Adding the spot in the UI for one could enable the addition of a different, more urgent notice for the other.

[chrissound]

I think this would be really useful and informative. Though possibly a better approach is to deprecate all the modules within the package.