Remove react-packager indirection.

Summary:
This moves the `src` directory one level up and removes the `react-packager` folder. Personally, I always disliked this indirection. I'm reorganizing some things in RNP, so this seems to make sense.

Not sure if I forgot to update any paths. Can anyone advice if there are more places that need change?

Reviewed By: jeanlauliac

Differential Revision: D4487867

fbshipit-source-id: d63f9c79d6238300df9632d2e6a4e6a4196d5ccb

packager/src/ModuleGraph/worker.js

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2016-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ */
+'use strict';
+
+const asyncify = require('async/asyncify');
+const optimizeModule = require('./worker/optimize-module');
+const transformModule = require('./worker/transform-module');
+const wrapWorkerFn = require('./worker/wrap-worker-fn');
+
+import type {OptimizationOptions} from './worker/optimize-module';
+import type {TransformOptions} from './worker/transform-module';
+import type {WorkerFnWithIO} from './worker/wrap-worker-fn';
+
+exports.optimizeModule =
+  (wrapWorkerFn(asyncify(optimizeModule)): WorkerFnWithIO<OptimizationOptions>);
+exports.transformModule =
+  (wrapWorkerFn(transformModule): WorkerFnWithIO<TransformOptions>);