added a check to prevent casper running with phantomjs < 1.5

@@ -27,6 +27,10 @@
  * DEALINGS IN THE SOFTWARE.
  *
  */
+if (phantom.version.major !== 1 || phantom.version.minor < 5) {
+    console.error('CasperJS needs at least PhantomJS v1.5.0');
+    phantom.exit(1);
+}
 
 /**
  * Loads and initialize the CasperJS environment.

@@ -14,7 +14,7 @@
     }
   ],
   "dependencies": {
-    "http://www.phantomjs.org/": "1.3"
+    "http://www.phantomjs.org/": "1.5"
   },
   "bugs": {
     "url": "https://github.com/n1k0/casperjs/issues"