* Mono.Documentation/ManifestResourceResolver.cs:

	* Mono.Documentation/ManifestResourceResolver.cs:
	  Assembly.GetManifestResourceStream() throws an exception if the
	  resource isn't present (instead of returning null), so don't just
	  call it to see if the resource exists.
	* Resources/mdoc-html-utils.xsl: .NET compatibility fixes (so that
	  mdoc can run under .NET w/o bundling Mono's System.Xml):
	  - Use msxsl:node-set() when required.
	  - Use <xsl:variable/> not <xsl:param/> when a variable is needed.
	  - Change semantics of GetLinkTarget(): instead of returning
	    javascript code (previous behavior) or '--not-available--' (did
	    this ever happen), return "" if the target can't be found.
	  - Add GetLinkTargetHtml() to wrap GetLinkTarget() and return the
	    previous javascript if the target couldn't be found.

svn path=/trunk/mcs/; revision=147494