* glib/dbus-gvalue-utils.c (hash_free_from_gtype): handle gdouble

* glib/dbus-gvalue-utils.c (hash_free_from_gtype): handle gdouble
and G_TYPE_VALUE_ARRAY (DBUS_TYPE_STRUCT)
(gvalue_from_hash_value, hash_value_from_gvalue): handle gdouble

* glib/dbus-gvalue.c (dbus_gvalue_to_signature): add missing
DBUS_STRUCT_BEGIN_CHAR and DBUS_STRUCT_END_CHAR charaters
when constructing struct signatures

* python/_dbus.py (Bus): handle private connections using the
private keyword in the constructor. defaults to private=False
(Bus::close): new method to close a connection to the bus

* python/dbus_bindings.pyx (Connection::close): renamed method
was previously called disconnect
(bus_get): now supports getting a private connection

* python/proxies.py (ProxyMethod::__call__): check if ignore_reply
keyword is set to True.  if it is, execute the method without waiting
for a reply
(ProxyObject::_introspect_execute_queue): new method for executing
all the pending methods that were waiting for the introspect to
finish.  this is called when introspect either succeeds or fails
(ProxyObject::_introspect_error_handler): call queued methods