Get rid of some unused warnings.

src/env.rs

@@ -6,6 +6,7 @@ pub fn dburl() -> String {
     require_var("RPHOTOS_DB", "Database url")
 }
 
+#[allow(dead_code)]
 pub fn jwt_key() -> String {
     require_var("JWT_KEY", "Signing key for jwt")
 }

src/photosdir.rs

@@ -18,6 +18,7 @@ impl PhotosDir {
         }
     }
 
+    #[allow(dead_code)]
     pub fn get_scaled_image(&self, photo: Photo, width: u32, height: u32)
                         -> Vec<u8> {
         let path = self.basedir.join(photo.path);

src/readkpa.rs

@@ -143,6 +143,7 @@ fn main() {
                 break;
             },
             XmlEvent::StartElement{ref name, ref attributes, ref namespace} => {
+                debug!("Found {} {:?} {:?}", name, attributes, namespace);
                 match &*name.local_name {
                     "image" => {
                         if let Some(file) = find_attr("file", attributes) {