extract the welcome message into a separate module

lib/base.js

@@ -32,7 +32,6 @@ var fileLogger = { write: _.noop, warn: _.noop };
  * Every generator should extend this base class.
  *
  * @constructor
- * @mixes util/common
  * @mixes actions/actions
  * @mixes actions/fetch
  * @mixes actions/file
@@ -190,11 +189,14 @@ _.extend(Base.prototype, require('./actions/string'));
 _.extend(Base.prototype, require('./actions/remote'));
 _.extend(Base.prototype, require('./actions/wiring'));
 _.extend(Base.prototype, require('./actions/help'));
-_.extend(Base.prototype, require('./util/common'));
 Base.prototype.user = require('./actions/user');
 Base.prototype.invoke = require('./actions/invoke');
 Base.prototype.spawnCommand = require('./actions/spawn_command');
 
+// TODO: Remove before 1.0.0
+// DEPRECATED: Use the module directly
+Base.prototype.welcome = require('yeoman-welcome');
+
 /**
  * Prompt user to answer questions. The signature of this method is the same as {@link https://github.com/SBoudrias/Inquirer.js Inquirer.js}
  *

package.json

@@ -65,7 +65,8 @@
     "user-home": "^1.1.0",
     "xdg-basedir": "^1.0.0",
     "yeoman-assert": "^1.0.0",
-    "yeoman-environment": "^1.1.0"
+    "yeoman-environment": "^1.1.0",
+    "yeoman-welcome": "^1.0.0"
   },
   "devDependencies": {
     "gulp": "^3.6.0",