debugtoolbar code/docs say it requires pyramid>=1.2dev but actually requires 1.4

[lambacck]

invoke_subrequest was introduced in 1.4:
http://docs.pylonsproject.org/docs/pyramid/en/latest/narr/subrequest.html#invoking-a-subrequest

It gets used here:
https://github.com/Pylons/pyramid_debugtoolbar/blob/master/pyramid_debugtoolbar/toolbar.py#L200

Looks like it was introduced prior to 2.0:
9c47df3

Readme & docs say 1.2a1:
https://github.com/Pylons/pyramid_debugtoolbar/blame/master/README.rst#L7
https://github.com/Pylons/pyramid_debugtoolbar/blame/master/docs/index.rst#L19

Setup says >=1.2dev:
https://github.com/Pylons/pyramid_debugtoolbar/blob/master/setup.py#L27

[inklesspen]

Since test_toolbar does not pass its requests through a Pyramid router (it generates request objects and feeds them to a tween), request.invoke_subrequest is not available. So test_toolbar makes a mock method. This mock method allows the tests to pass with Pyramid 1.3 even though they should not.

[mmerickel]

We've pinned the toolbar to >= 1.4.