Install pre-bundled packages 2/N

Summary: A first simple version of pre-bundled plugin installation. Currently both pre-bundled and source-only plugins are supported. Pre-bundled plugins should have folder "dist" inside and package.json's "main" field should point to the entry point script there.

Reviewed By: passy

Differential Revision: D19834020

fbshipit-source-id: 7e0b495fb9666acbb22fc32ca2382339cd9dc72f

src/dispatcher/plugins.tsx

@@ -80,7 +80,7 @@ export default (store: Store, logger: Logger) => {
 };
 
 function getBundledPlugins(): Array<PluginDefinition> {
-  if (!isProduction()) {
+  if (!isProduction() || process.env.FLIPPER_NO_EMBEDDED_PLUGINS) {
     // Plugins are only bundled in production builds
     return [];
   }