Make predicate mismatches not hide other possible valid views.

This is mostly an issue for REST style views that use request_method
predicates and are registered for context interfaces.

See Issue #409
Change log note.
Merge branch 'master' of github.com:Pylons/pyramid
Update documentation for include_ip

Add a note that using the include_ip functionality with IPv6 is not a
good idea due to the users network expiring IPv6 addresses quickly.

See preferred lifetime/valid lifetime for routers doing SLAAC in IPv6
for more information.
Add test for AuthTktCookieHelper for IPv6 compat

Add an extra test that sets environ['REMOTE_ADDR'] to an IPv6 address
"::1".
Add tests for AuthTicket/parse_ticket for IPv6 compat

Add some simple tests that test IPv6 compatibility with the AuthTicket
class and the parse_ticket function.
Fix IPv6 compatibility in calculate_digest()

This is a quick fix for adding IPv6 compatibility so that if the
AuthTktAuthenticationPolicy is used with include_ip enabled then it
won't throw an error.
Sign CONTRIBUTORS.txt
remove questionable sentence

I could not tell whether it was meant to be humorous, or if it simply was a mistake. Regardless, I think it does not add much. If Speed needs to be defended, perhaps something better would do. For now, I remove.
Add some tests for how content types and HTTP "Accept" header handling
behave.
this info was given in the preceding paragraph
virtualenv refers both to the tool and the concept
improve paragraph
grammar fixes
use 'rfc' role to link to the RFCs; this fixes one link, for free
update some links and fix others
fix link
update link
use cross-references to fix some links

Also fix grammar, and add a bit of consistency regarding formatting.
make it clear where the link goes