Set requestUrl and responseUrl of HtmlDocument as currentUrl
Ref #53 Add method to retrieve and apply css content of every stylesheet linked in a link-tag.
Simplify specific code "parent parent parent parent" to general "self document"
Rename setContent to loadStyles
Remove empty stylesheet test class
Merge branch 'master' into parsing/link-rel

Conflicts:
	packages/HTML.package/monticello.meta/version
	packages/Scamper.package/Scamper.class/instance/displayTextHtmlPage..st
	packages/Scamper.package/Scamper.class/methodProperties.json
	packages/Scamper.package/monticello.meta/version
Merge pull request #93 from SWTI2014/parsing/link-rel

Ref #53: Parsing/link-rel