Update staticdirect stuff so it can handle "domains" of staticdirection

mediagoblin/tests/test_staticdirect.py

@@ -0,0 +1,9 @@
+from mediagoblin.tools import staticdirect
+
+def test_staticdirect():
+    sdirect = staticdirect.StaticDirect(
+      {None: "/static/",
+       "theme": "http://example.org/themestatic"})
+    assert sdirect("css/monkeys.css") == "/static/css/monkeys.css"
+    assert sdirect("images/lollerskate.png", "theme") == \
+        "http://example.org/themestatic/images/lollerskate.png"