Fix dates in memory adapter

lib/adapters/memory.js

@@ -70,7 +70,7 @@ Memory.prototype.exists = function exists(model, id, callback) {
 
 Memory.prototype.find = function find(model, id, callback) {
     process.nextTick(function () {
-        callback(null, id in this.cache[model] && JSON.parse(this.cache[model][id]));
+        callback(null, id in this.cache[model] && this.fromDb(model, this.cache[model][id]));
     }.bind(this));
 };
 
@@ -79,10 +79,34 @@ Memory.prototype.destroy = function destroy(model, id, callback) {
     process.nextTick(callback);
 };
 
+Memory.prototype.fromDb = function(model, data) {
+    if (!data) return null;
+    data = JSON.parse(data);
+    var props = this._models[model].properties;
+    Object.keys(data).forEach(function (key) {
+        var val = data[key];
+        if (typeof val === 'undefined' || val === null) {
+            return;
+        }
+        if (props[key]) {
+            switch(props[key].type.name) {
+                case 'Date':
+                val = new Date(val.toString().replace(/GMT.*$/, 'GMT'));
+                break;
+                case 'Boolean':
+                val = new Boolean(val);
+                break;
+            }
+        }
+        data[key] = val;
+    });
+    return data;
+};
+
 Memory.prototype.all = function all(model, filter, callback) {
     var self = this;
     var nodes = Object.keys(this.cache[model]).map(function (key) {
-        return JSON.parse(this.cache[model][key]);
+        return this.fromDb(model, this.cache[model][key]);
     }.bind(this));
 
     if (filter) {