Removing Deprecated XFire Services
Added DTD declarations to Struts XML files

  * With the removal of XFire, the deprecated XML validator was removed,
    so now the XML must be well-formed
Migrating Teacher
Migrated WebsiteManager
Recovered old CMS code
Moved Installer into a Bennu Bootstrapper

  * Also fixed typo in Installation class
  * Removed duplicated Installation fields
Updated Migration Instructions
Refactor: Updated fenix-legacy-tools, removed references to Language

  * Also using the new MLS API
Removed GWT