#11 Error on importing in browser

* fixes:
  #11 Error on importing in browser - fix angular definition
  #11 Error on importing in browser

@@ -5,11 +5,11 @@
 (function (definition) {
 
     // Node export
-    if(global && module && module.exports) return module.exports = definition();
+    if(typeof global != 'undefined' && typeof module != 'undefined' && module.exports) return module.exports = definition();
     //Browser export
-    if(window){
-        if(angular && angular.version.major == 1) return angular.module('relative-placement-js').factory('RelativePlacement', definition);
-        if(requirejs) return define(definition());
+    if(typeof window != 'undefined'){
+        if(typeof angular != 'undefined' && angular.version.major == 1) return angular.module('relative-placement-js', []).factory('RelativePlacement', definition);
+        if(typeof requirejs != 'undefined') return define(definition());
 
         window.RelativePlacement = definition();
     }