Improve the HTTP request nodes and add new related nodes (#2896)

* Improve the network request nodes and add new ones to process data

* Use Content-Type: application/octet-stream

* Add 'Gamma Correction' node

node-graph/gstd/src/lib.rs

@@ -1,5 +1,4 @@
 pub mod any;
-pub mod http;
 pub mod text;
 #[cfg(feature = "wasm")]
 pub mod wasm_application_io;