Changed guessing of serialization to first try functional parser as t…

…hey don't panic.

src/lib.rs

@@ -120,8 +120,8 @@ fn open_ontology_from_string(ontology: String, serialization: Option<&str>) -> P
         Some(ResourceType::OFN) => open_ontology_ofn(&mut f, &b),
         Some(ResourceType::OWX) => open_ontology_owx(&mut f, &b),
         Some(ResourceType::RDF) => open_ontology_rdf(&mut f, &b),
-        None => open_ontology_rdf(&mut f, &b)
-            .or_else(|_| open_ontology_ofn(&mut f, &b))
+        None => open_ontology_ofn(&mut f, &b)
+            .or_else(|_| open_ontology_rdf(&mut f, &b))
             .or_else(|_| open_ontology_owx(&mut f, &b))
     }.map_err(to_py_err!("Failed to open ontology"))?;