Add async methods.

Now you can use
- Client.prototype.writeAsync
- Client.prototype.kickAsync
- Client.prototype.modeAsync
- etc...

They take the same arguments as the original methods except callback. And they
return a promise.

index.js

@@ -7,6 +7,7 @@ var Emitter = require('events').EventEmitter;
 var debug = require('debug')('qbirc');
 var Parser = require('qbirc-parser');
 var replies = require('irc-replies');
+var Promise = require('bluebird');
 
 /**
  * Core plugins.
@@ -411,3 +412,10 @@ Client.prototype.onmessage = function(msg) {
 function toArray(val) {
   return Array.isArray(val) ? val : [val];
 }
+
+
+/**
+ * Add async methods that return a promise.
+ */
+
+Promise.promisifyAll(Client.prototype);

package.json

@@ -12,9 +12,10 @@
     "chat"
   ],
   "dependencies": {
+    "bluebird": "^3.3.5",
+    "debug": "^2.2.0",
     "irc-replies": "^2.0.1",
-    "qbirc-parser": "^0.1.1",
-    "debug": "^2.2.0"
+    "qbirc-parser": "^0.1.1"
   },
   "devDependencies": {
     "mocha": "^2.4.5",