updated the readme [ci skip]
removed leftover from operation refactoring
removed unused fixtures
added Wasabi#inspect

this is supposed to help people quickly find out what Wasabi
knows about a service. Probably very helpful for debugging.
added a simple compatibility spec for all fixtures

this is based on Wasabi#inspect. the idea is to run as much of
the code for as many fixtures as possible to find problems without
having to write specs for every single feature.

introduces four spec failures.
fixed #inspect for non-soap-bindings
fixed #inspect for element namespace declarations

namespaces defined on schema elements are now found, used and stored.
disabled compatibility spec for juniper