improve Ember.js compatibility

references madrobby#462

Author: mislav

src/data.js

@@ -6,8 +6,7 @@
 
 ;(function($) {
   var data = {}, dataAttr = $.fn.data, camelize = $.zepto.camelize,
-    uuid = $.uuid = +new Date(),
-    exp  = $.expando = 'Zepto' + uuid
+    exp = $.expando = 'Zepto' + (+new Date())
 
   // Get value from node:
   // 1. first try key as given,
@@ -28,7 +27,7 @@
 
   // Store value under camelized key on node
   function setData(node, name, value) {
-    var id = node[exp] || (node[exp] = ++uuid),
+    var id = node[exp] || (node[exp] = ++$.uuid),
       store = data[id] || (data[id] = attributeData(node))
     if (name !== undefined) store[camelize(name)] = value
     return store

src/zepto.js

@@ -211,6 +211,11 @@ var Zepto = (function() {
     return emptyArray.indexOf.call(array, elem, i)
   }
 
+  $.trim = function(str) { return str.trim() }
+
+  // plugin compatibility
+  $.uuid = 0
+
   $.map = function(elements, callback){
     var value, values = [], i, key
     if (likeArray(elements))
@@ -267,6 +272,7 @@ var Zepto = (function() {
     get: function(idx){
       return idx === undefined ? slice.call(this) : this[idx]
     },
+    toArray: function(){ return this.get() },
     size: function(){
       return this.length
     },