Use wasm-server-runner instead of cargo-run-wasm

This integrates much more cleanly with Cargo, and allows people to use
the guidance in their own projects without further setup.

Author: madsmtm

.cargo/config.toml

@@ -2,3 +2,6 @@
 Cargo.lock
 /.idea
 /.vscode
+
+# Allow people to customize this for their own checkouts.
+.cargo

.gitignore

@@ -1,6 +1,3 @@
-[workspace]
-members = ["run-wasm"]
-
 [package]
 name = "softbuffer"
 version = "0.4.8"

Cargo.toml

@@ -66,7 +66,20 @@ Pull requests to add support for new platforms are welcome!
 
 ## WebAssembly
 
-To run an example with the web backend: `cargo run-wasm --example winit`
+To run an example with the web backend, add the following to `.cargo/config.toml`:
+```toml
+[target.'cfg(target_family = "wasm")']
+runner = "wasm-server-runner"
+```
+
+And then run:
+
+```sh
+cargo install wasm-server-runner
+cargo run --target wasm32-unknown-unknown --example winit
+```
+
+And open the link to view the result in the browser.
 
 ## Android