Finish hooking up XML parser

added script integration with xml5ever

Updated test expectations

Removed timeout test expectation

Refactors

application/xhtml+xml is treated as HTML

Updated xml5ever

Updated Text Expectations

components/script/dom/servoxmlparser.rs

@@ -128,6 +128,8 @@ impl ServoXMLParser {
             if !pending_input.is_empty() {
                 let chunk = pending_input.remove(0);
                 self.tokenizer.borrow_mut().feed(chunk.into());
+            } else {
+                self.tokenizer.borrow_mut().run();
             }
 
             // Document parsing is blocked on an external resource.