Add metadata (#45)

* Add wasm-pack metadata
* Add Wasm tests directory
* Add basic Cargo manifest metadata
* Make web frontend unpublishable to npm

client/web/wasm/tests/web.rs

@@ -0,0 +1,10 @@
+#![cfg(target_arch = "wasm32")]
+
+use wasm_bindgen_test::*;
+
+wasm_bindgen_test_configure!(run_in_browser);
+
+#[wasm_bindgen_test]
+fn pass() {
+	assert_eq!(1 + 1, 2);
+}