Extend String with +xmlize+ method for convenience.

Methods
Public Instance methods
xmlize()
    # File lib/twitter/rails.rb, line 10
10:   def xmlize
11:     # Forget module/namespace for now as this is totally broken in Rails 1.2.x 
12:     # (search for namespaced models on the Rails Trac site)
13:     cls = self.split('::').pop
14:     cls.dasherize.downcase
15:   end