Upgrade WebTest to 1.4.0
This version contains the change at https://bitbucket.org/ianb/webtest/changeset/3d7e38a9b773a6824ef735dd04af34ac5f710ae0 which avoids some test failures for Hg in some environments
Authored by: Dave Brondsema 2012-09-27
Parent(s): [6779fe]
Child(ren): [bba9bc]