Take wsgi environment from request (request.environ) instead of passing Request directly as environment

(WsgiApplication.__call__ takes wsgi environment as first argument, passing pyramid Request instead of it does not work, resulting in 'does not have __getitem__' exception).
Simple test for integration with Pyramid (only basic testing and only soap)
Merge pull request #333 from kolen/master

Fix for PyramidApplication, pass environment of request instead of request itself
fix typo
make HtmlRowTable and HtmlColumnTable public
fix spyne field->sqla col nullable attr conversion for already-existing columns.
implement delayed child attr customization
update run_tests requirements