Add Set Title RPC call

Adds support for the 'set title' opensocial api call.

Index: container.js
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/ShindigIntegrator/shindig_integrator/container.js,v
retrieving revision 1.1 
diff -b -r1.1 container.js
21a22
>   gadgets.rpc.register('set_title', this.setTitle);
36a38,45
>   gadgets.IfrContainer.prototype.setTitle = function(title) {
>     var element = $(this.f + '_title');
>     if (element != undefined) {
>       // update the title, and make sure we don't break it's html
>       element.text(title.replace(/&/g, '&amp;').replace(/</g, '&lt;'));
>     }   
>   };  
> 

Code, like much of the rest of container.js comes from partuza.