Add travis build-flag

Author: LevelbossMike

README.md

@@ -1,4 +1,4 @@
-# Ember-cli-deploy-slack
+# Ember-cli-deploy-slack [![Build Status](https://travis-ci.org/LevelbossMike/ember-cli-deploy-slack.svg?branch=master)](https://travis-ci.org/LevelbossMike/ember-cli-deploy-slack)
 
 An ember-cli-deploy-plugin for sending deployment messages to [Slack](https://slack.com/).
 

index.js

@@ -1,7 +1,7 @@
 /* jshint node: true */
 'use strict';
 
-var Promise       = require('ember-cli/lib/Ext/promise');
+var Promise       = require('ember-cli/lib/ext/promise');
 var SilentError   = require('ember-cli/lib/errors/silent');
 var SlackNotifier = require('./lib/slack-notifier');
 var DeployPluginBase = require('ember-cli-deploy-plugin');

lib/slack-notifier.js

@@ -1,4 +1,4 @@
-var Promise    = require('ember-cli/lib/Ext/promise');
+var Promise    = require('ember-cli/lib/ext/promise');
 var CoreObject = require('core-object');
 var Slack      = require ('node-slackr');
 

node-tests/unit/slack-test.js

@@ -2,7 +2,7 @@ var expect        = require('chai').expect;
 var sinon         = require('sinon');
 var Slack = require('node-slackr');
 var SlackNotifier = require('../../lib/slack-notifier.js');
-var Promise    = require('ember-cli/lib/Ext/promise');
+var Promise    = require('ember-cli/lib/ext/promise');
 
 var WEBHOOK_URL = 'https://hooks.slack.com/services/123123';
 var CHANNEL     = '#testing';