Kill off olm-loader

Now that Olm needs to be inited asynchronously anyway, we can just
pass the options to Olm.init(), and as long as we do that before we
start the js-sdk, we're all good.

This will means the olm js is now part of the main bundle but since
it's now just a wrapper around the wasm, this is probably faster.

Also add the directwatch flag to olm.wasm because otherwise it
doesn't seem to copy the file in watch mode...

scripts/copy-res.js

@@ -60,7 +60,7 @@ const COPY_LIST = [
     // XXX: This is tied quite heavily to the matching olm.js so it really should be
     // in the bundle dir with the js to avoid caching issues giving us wasm that
     // doesn't match our js, but I cannot find any way to get webpack to do this.
-    ["node_modules/olm/olm.wasm", "webapp"],
+    ["node_modules/olm/olm.wasm", "webapp", { directwatch: 1 }],
     ["./config.json", "webapp", { directwatch: 1 }],
 ];