Test using a deprecated feature

Pseudo has been removed from the spec. These tests are obsolete.
Delete tests better handled in Aryeh's tests and other tests
delete tests better handled in /html/dom/interfaces.html
Rewrite infraware tests on appcache
Updated distributed to content
Merge remote-tracking branch 'upstream/master' into infraware-forms
revert tests per https://critic.hoppipolla.co.uk/r/738
Fixed wrong expectation and added a counterpoint

In this case the shadow content should not be rendered. Also added a
counterpoint case.
tests for document.{cookie,lastModified,readyState}
set Last-Modified to a specific date and test a specific expected string instead of format
add use case when Last-Modified header is missing
use currentState instead of string
test value when DOMContentLoaded event is fired
tests for callbacks created and detached
improving tests according to Dominic's notes
fixing minor typos
changing tests according to clarifications from Dimitri Glazkov
improving tests according to Dominic's notes
Extend the Document.createComment test a bit.
Remove race condition in test.
Fix order dependence in iframe test and fix use of setTimeout in many tests.