add CommonRequest.header

src/main/java/com/imyeyu/network/FileRequest.java

@@ -40,6 +40,21 @@ public class FileRequest extends CommonRequest {
 		return this;
 	}
 
+	public FileRequest header(String key, String value) {
+		request.addHeader(key, value);
+		return this;
+	}
+
+	public FileRequest token(String token) {
+		request.addHeader("Token", token);
+		return this;
+	}
+
+	public FileRequest language(String langHeader) {
+		request.addHeader("Accept-Language", langHeader);
+		return this;
+	}
+
 	public void toFile(String path, String fileName) throws IOException, NoPermissionException {
 		toFile(new File(IO.fitPath(path) + fileName));
 	}