Disallow nightly failures (#115)

Always install rustfmt since nightly may change underneath it, causing
linking to break.

Apply rustfmt

src/proto/streams/recv.rs

@@ -154,8 +154,8 @@ where
         }
 
         if !stream.content_length.is_head() {
-            use http::header;
             use super::stream::ContentLength;
+            use http::header;
 
             if let Some(content_length) = frame.fields().get(header::CONTENT_LENGTH) {
                 let content_length = match parse_u64(content_length.as_bytes()) {

src/proto/streams/stream.rs

@@ -199,8 +199,8 @@ where
             // There are no more outstanding references to the stream
             self.ref_count == 0 &&
             // The stream is not in any queue
-            !self.is_pending_send && !self.is_pending_send_capacity &&
-            !self.is_pending_accept && !self.is_pending_window_update
+            !self.is_pending_send && !self.is_pending_send_capacity
+            && !self.is_pending_accept && !self.is_pending_window_update
     }
 
     pub fn assign_capacity(&mut self, capacity: WindowSize) {

src/proto/streams/streams.rs

@@ -324,8 +324,8 @@ where
         request: Request<()>,
         end_of_stream: bool,
     ) -> Result<StreamRef<B, P>, SendError> {
-        use http::Method;
         use super::stream::ContentLength;
+        use http::Method;
 
         // TODO: There is a hazard with assigning a stream ID before the
         // prioritize layer. If prioritization reorders new streams, this