Add tests for more <script> types
See https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script#attr-type
and https://developer.mozilla.org/en-US/Firefox/Releases/17/Site_compatibility#MIME_types_treated_as_JavaScript_have_increased
Correctly escape special HTML symbols in tests output
Add support for more <script> types
Merge pull request #471 from Infocatcher/correct-script-type

Add support for more <script> types