Add more supported XEPs to server info list

Adds the following XEPs to the server info list in the account manager:

  - XEP-0237: Roster Versioning
  - XEP-0352: Client State Indication

![screenshot_2014-10-21-23-04-12](https://cloud.githubusercontent.com/assets/512573/4730400/d204a29a-5998-11e4-8eb6-1a02067d4bd9.png)