Fix #21

Default serializer changed from YAML to Marshal (to avoid UTF-8 errors on BackTrack)
Spec for UTF-8 updated

spec/lib/browser_spec.rb

@@ -300,13 +300,13 @@ describe Browser do
     end
   end
 
-    describe "testing UTF8" do
-      it "should not throw an encoding exception" do
-        url = SPEC_FIXTURES_DIR + "/utf8.html"
-        stub_request(:get, url).to_return(:status => 200, :body => File.read(url))
-        response1 = @browser.get(url)
-        response1.body
-      end
+  describe "testing UTF8" do
+    it "should not throw an encoding exception" do
+      url = SPEC_FIXTURES_DIR + "/utf8.html"
+      stub_request(:get, url).to_return(:status => 200, :body => File.read(url))
+      response1 = @browser.get(url)
+      expect { response1.body }.to_not raise_error
     end
   end
+end