removed references to deprecated add functions.

demo documentation still refers to deprecated add functions.

demo/demo.html

@@ -87,7 +87,7 @@ var YourCtrl = function($scope, localStorageService, ...) {
   // Removes all local storage
   localStorageService.clearAll();
   // You can also play with cookies the same way
-  localStorageService.cookie.add('localStorageKey','I am a cookie value now');
+  localStorageService.cookie.set('localStorageKey','I am a cookie value now');
 }</pre>
 
   <h3>API Access</h3>
@@ -109,7 +109,7 @@ var YourCtrl = function($scope, localStorageService, ...) {
         <td>Boolean for success</td>
       </tr>
       <tr>
-        <td><code>add</code></td>
+        <td><code>set</code></td>
         <td><small>key, value</small></td>
         <td>Adds a key-value pair to the browser local storage</td>
         <td>Boolean for success</td>
@@ -134,7 +134,7 @@ var YourCtrl = function($scope, localStorageService, ...) {
       </tr>
       <tr>
         <td><code>cookie</code></td>
-        <td><small>add | get | remove | clearAll</small></td>
+        <td><small>set | get | remove | clearAll</small></td>
         <td>Each function within cookie uses the same arguments as the coresponding local storage functions</td>
         <td>n/a</td>
       </tr>