6.0.0

I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.

packages/babylon/src/parser/index.js

@@ -4,8 +4,6 @@ import { reservedWords } from "../util/identifier";
 import { getOptions } from "../options";
 import Tokenizer from "../tokenizer";
 
-// Registered plugins
-
 export const plugins = {};
 
 export default class Parser extends Tokenizer {
@@ -14,12 +12,10 @@ export default class Parser extends Tokenizer {
     super(options, input);
 
     this.options = options;
+    this.inModule = this.options.sourceType === "module";
     this.isReservedWord = reservedWords[6];
     this.input = input;
-    this.loadPlugins(this.options.plugins);
-
-    // Figure out if it's a module code.
-    this.inModule = this.options.sourceType === "module";
+    this.plugins = this.loadPlugins(this.options.plugins);
 
     // If enabled, skip leading hashbang line.
     if (this.state.pos === 0 && this.input[0] === "#" && this.input[1] === "!") {
@@ -27,20 +23,31 @@ export default class Parser extends Tokenizer {
     }
   }
 
-  hasFeature(name: string): boolean {
-    return !!this.options.features[name];
+  hasPlugin(name: string): boolean {
+    return !!(this.plugins["*"] || this.plugins[name]);
   }
 
   extend(name: string, f: Function) {
     this[name] = f(this[name]);
   }
 
-  loadPlugins(plugins) {
-    for (let name in plugins) {
-      let plugin = exports.plugins[name];
-      if (!plugin) throw new Error(`Plugin '${name}' not found`);
-      plugin(this, plugins[name]);
+  loadPlugins(plugins: Array<string>) {
+    let pluginMap = {};
+
+    if (plugins.indexOf("flow") >= 0) {
+      // ensure flow plugin loads last
+      plugins.splice(plugins.indexOf("flow"), 1);
+      plugins.push("flow");
     }
+
+    for (let name of plugins) {
+      pluginMap[name] = true;
+
+      let plugin = exports.plugins[name];
+      if (plugin) plugin(this);
+    }
+
+    return pluginMap;
   }
 
   parse(): {