Add WebIDL support for the ArrayBuffer type

Should help enable a slew of new bindings as well.

crates/web-sys/Cargo.toml

@@ -16,6 +16,7 @@ sourcefile = "0.1"
 
 [dependencies]
 wasm-bindgen = { path = "../..", version = "0.2.15" }
+js-sys = { path = '../js-sys', version = '0.2.0' }
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
 futures = "0.1"

crates/web-sys/src/lib.rs

@@ -1,5 +1,6 @@
 #![doc(html_root_url = "https://docs.rs/web-sys/0.2")]
 
 extern crate wasm_bindgen;
+extern crate js_sys;
 
 include!(concat!(env!("OUT_DIR"), "/bindings.rs"));