fix(ie8): fix calls to indexOf and filter

Closes #1556

Author: christopherthielen

src/common.js

@@ -174,7 +174,7 @@ function omit(obj) {
   var copy = {};
   var keys = Array.prototype.concat.apply(Array.prototype, Array.prototype.slice.call(arguments, 1));
   for (var key in obj) {
-    if (keys.indexOf(key) == -1) copy[key] = obj[key];
+    if (indexOf(keys, key) == -1) copy[key] = obj[key];
   }
   return copy;
 }

src/urlMatcherFactory.js

@@ -520,7 +520,7 @@ Type.prototype.$asArray = function(mode, isSearch) {
         val = arrayWrap(val);
         var result = map(val, callback);
         if (allTruthyMode === true)
-          return result.filter(falsey).length === 0;
+          return filter(result, falsey).length === 0;
         return arrayUnwrap(result);
       };
     }