Fix: server rendering by checking document and window object are defined

Author: sujaykathrotia

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "tether",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "homepage": "http://github.hubspot.com/tether",
   "authors": [
     "Zack Bloom <zackbloom@gmail.com>",

component.json

@@ -1,7 +1,7 @@
 {
   "name": "tether",
   "repo": "HubSpot/tether",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "A client-side library to make absolutely positioned elements attach to elements in the page efficiently.",
   "authors": [
     "Zack Bloom <zackbloom@gmail.com>",