Enable running blueprint without entity name

Missed a comma after description and fix issue running blueprint
without an entity name. Fixes #6

blueprints/ember-cli-bootswatch/index.js

@@ -1,5 +1,11 @@
 module.exports = {
-  description: 'Add bower dependencies for bootstrap and bootswatch to the project'
+  description: 'Add bower dependencies for bootstrap and bootswatch to the project',
+
+  normalizeEntityName: function() {
+    // allows us to run ember -g ember-cli-bootswatch and not blow up
+    // because ember cli normally expects the format
+    // ember generate <entitiyName> <blueprint>
+  },
 
   afterInstall: function(options) {
     return this.addBowerPackagesToProject([