Split out the Egui demo code to new crate egui_demo_lib

egui_demo/Cargo.toml

@@ -10,6 +10,7 @@ crate-type = ["cdylib", "rlib"]
 
 [dependencies]
 egui = { path = "../egui", features = ["serde", "serde_json"] }
+egui_demo_lib = { path = "../egui_demo_lib" }
 serde = { version = "1", features = ["derive"] }
 
 # For compiling natively:

egui_demo/src/lib.rs

@@ -12,7 +12,7 @@ use wasm_bindgen::prelude::*;
 #[cfg(target_arch = "wasm32")]
 #[wasm_bindgen]
 pub fn start(canvas_id: &str) -> Result<(), wasm_bindgen::JsValue> {
-    let app = egui::DemoApp::default();
+    let app = egui_demo_lib::DemoApp::default();
     egui_web::start(canvas_id, Box::new(app))?;
     Ok(())
 }

egui_demo/src/main.rs

@@ -4,6 +4,6 @@
 
 // When compiling natively:
 fn main() {
-    let app = egui::DemoApp::default();
+    let app = egui_demo_lib::DemoApp::default();
     egui_glium::run(Box::new(app));
 }