Added polyfills for Array::map and String::trim

@@ -6,6 +6,30 @@
 # The Rivets namespace.
 Rivets = {}
 
+# Polyfill For String::trim
+unless String::trim
+  String::trim = -> return @.replace(/^\s\*/, '').replace(/\s\s*$/, '')
+
+# Polyfill For Array::map
+unless Array::map
+  Array::map = (callback) ->
+    if this is null
+      throw new TypeError "Can't convert #{this} to object"
+    O = Object(this)
+    len = O.length >>> 0
+
+    throw new TypeError "#{callback} is not a function" unless typeof callback is 'function'
+
+    T = arguments[1]
+    A = new Array(len)
+    k = 0;
+
+    while k < len
+      A[k] = callbackfn.call(T, O[k], k, O)  if k of O
+      k++
+
+    return A
+
 # A single binding between a model attribute and a DOM element.
 class Rivets.Binding
   # All information about the binding is passed into the constructor; the DOM