Removed unnecessary side bar with duplicate content

The side-bar contained a duplication of code that was already in the
main article. Adding a note instead and removing the side-bar provides
the same information without nearly as much duplication.
support a None value in query string parameters
set custom request methods when doing a pview lookup
update pviews to work with the bootstrapped request

had to fix DummyBootstrap a bit because it fails pretty hard at handling
part of bootstrap contract in which the request passed in should be
enhanced with the registry, and returned. In some cases the wrong
request or the wrong registry were being returned if the test case
actually specified a registry or request.
Docs: sessions.rst: Explain example.
Docs: sessions.rst: Sessions only work when the client cooperates.
Merge branch 'master' of github.com:Pylons/pyramid
fix merge conflict
 render the qs such that when provided with None as a value, it will render the key plus the equal sign
Merge branch 'fix.none-value-in-query-string'
Merge branch 'master' of github.com:Pylons/pyramid
Merge pull request #1138 from kpinc/doc_session

Docs: sessions.rst: Explain example.
Merge branch 'master' of github.com:Pylons/pyramid
get rid of note that appears to be explained in the next para
fix the docs build and get rid of stray references to Beaker
fix merge conflict
correct the explanation of the behavior change
Merge branch 'docs/remove_redundant' of github.com:bertjwregeer/pyramid into bertjwregeer-docs/remove_redundant
rearrange the fix
Merge branch 'bertjwregeer-docs/remove_redundant'