Provide .method() and .query_params()

src/error.rs

@@ -1,4 +1,4 @@
-use url::Url;
+use url::{ParseError, Url};
 
 use std::error;
 use std::fmt::{self, Display};
@@ -315,6 +315,14 @@ impl From<Transport> for Error {
     }
 }
 
+impl From<ParseError> for Error {
+    fn from(err: ParseError) -> Self {
+        ErrorKind::InvalidUrl
+            .msg(&format!("failed to parse URL: {:?}", err))
+            .src(err)
+    }
+}
+
 impl fmt::Display for ErrorKind {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {