closes #157 - added support for PhantomJS 1.6 WebPage#zoomFactor

 CasperJS Changelog
 ==================
 
-XXXX-XX-XX, v0.6.11
--------------------
+XXXX-XX-XX, v1.0
+----------------
 
 - fixed [#119](https://github.com/n1k0/casperjs/issues/119) - HTTP status wasn't properly caught
 - fixed [#132](https://github.com/n1k0/casperjs/issues/132) - added ability to include js/coffee files using a dedicated option when using the [`casper test` command](http://casperjs.org/testing.html)
@@ -11,6 +11,7 @@ XXXX-XX-XX, v0.6.11
 - fixed [#149](https://github.com/n1k0/casperjs/issues/149) - [`ClientUtils.fill()`](http://casperjs.org/api.html#casper.fill) was searching elements globally
 - fixed [#154](https://github.com/n1k0/casperjs/issues/154) - firing the `change` event after a field value has been set
 - fixed [#144](https://github.com/n1k0/casperjs/issues/144) - added a [`safeLogs` option](http://casperjs.org/api.html#casper.options) to blur password values in debug logs. **This option is set to `true` by default.**
+- fixed [#157](https://github.com/n1k0/casperjs/issues/157) - added support for PhantomJS 1.6 `WebPage#zoomFactor`
 - fixed failed test messages didn't expose the subject correctly
 - added [`Casper.userAgent()`](http://casperjs.org/api.html#casper.userAgent) to ease a more dynamic setting of user-agent string
 - added [`Tester.assertTitleMatch()`](http://casperjs.org/api.html#tester.assertTitleMatch) method

-Subproject commit ca382764f31f490d2e88983e2f0de46fbc2298ec
+Subproject commit 26b6e8aebd0ddeb877963b3f6e3721883b97fab9

@@ -1418,6 +1418,28 @@ Casper.prototype.waitWhileVisible = function waitWhileVisible(selector, then, on
 };
 
 /**
+ * Changes the current page zoom factor.
+ *
+ * @param  Number  factor  The zoom factor
+ * @return Casper
+ */
+Casper.prototype.zoom = function zoom(factor) {
+    "use strict";
+    if (!this.started) {
+        throw new CasperError("Casper has not been started, can't set zoom factor");
+    }
+    if (!utils.isNumber(factor) || factor <= 0) {
+        throw new CasperError("Invalid zoom factor: " + factor);
+    }
+    if ('zoomFactor' in this.page) {
+        this.page.zoomFactor = factor;
+    } else {
+        this.warn("zoom() requires PhantomJS >= 1.6");
+    }
+    return this;
+};
+
+/**
  * Extends Casper's prototype with provided one.
  *
  * @param  Object  proto  Prototype methods to add to Casper