better safe than sorry: hardcoded dependencies

package.json

@@ -49,22 +49,22 @@
   },
   "main": "./lib/sitespeed.js",
   "dependencies": {
-    "async": "0.9.x",
-    "browsertime": "0.8.x",
-    "cross-spawn": "0.2.x",
-    "dateformat": "1.0.x",
+    "async": "0.9.0",
+    "browsertime": "0.8.20",
+    "cross-spawn": "0.2.3",
+    "dateformat": "1.0.11",
     "fast-stats": "0.0.2",
-    "fs-extra": "0.13.x",
-    "gpagespeed": "0.0.8",
-    "handlebars": "2.0.x",
-    "nomnom": "1.8.x",
-    "phantomjs": "1.9.x",
-    "slimerjs": "0.9.x",
-    "tape": "3.0.x",
-    "valid-url": "1.0.x",
-    "webpagetest": "0.2.x",
-    "whereis": "0.4.x",
-    "winston": "0.8.x",
-    "xmlbuilder": "2.4.x"
+    "fs-extra": "0.15.0",
+    "gpagespeed": "1.0.0",
+    "handlebars": "2.0.0",
+    "nomnom": "1.8.1",
+    "phantomjs": "1.9.13",
+    "slimerjs": "0.9.2",
+    "tape": "3.4.0",
+    "valid-url": "1.0.9",
+    "webpagetest": "0.3.1",
+    "whereis": "0.4.0",
+    "winston": "0.8.3",
+    "xmlbuilder": "2.4.5"
   }
 }