0.5

• Added: Added a very simple example for implementing a mapping to PHP file
  streams. This should allow easy implementation of for example a WebDAV to FTP
  proxy.
• Added: HTTP Basic Authentication helper class.
• Added: Sabre_HTTP_Response class. This centralizes HTTP operations and will be
  a start towards the creating of a testing framework.
• Updated: Backwards compatibility break: all require_once() statements are
  removed from all the files. It is now recommended to use autoloading of
  classes, or just including lib/Sabre.includes.php. This fix was made to allow
  easier integration into applications not using this standard inclusion model.
• Updated: Better in-file documentation.
• Updated: Sabre_DAV_Tree can now work with Sabre_DAV_LockManager.
• Updated: Fixes a shared-lock bug.
• Updated: Removed ?> from the bottom of each php file.
• Updated: Split up some operations from Sabre_DAV_Server to
  Sabre_HTTP_Response.
• Fixed: examples are now actually included in the pear package.