* This gives us the best of both worlds.
  - We remain backwards compatable with pygobject by checking for existing
    attrs in the gobject module
  - If an attr does not exist we use the GI mechanism to look it up so that
    things like flags look the same whether exported from GObject, Gtk
    or any GI managed library

* add DynamicGObjectModule tests and make tests use the new module
  - change import gobject to from gi.repository import GObject