Added the movement modes to the hildon-pannable-area, with this modes the developers...

Added the movement modes to the hildon-pannable-area, with this modes the developers can control in which directions the widget can scroll. They can also connect to signals in order to do something when that happens, allowing applications scroll. There is an example uploaded showing how to use it.

* examples/Makefile.am:
	* examples/hildon-pannable-area-example-4.c: Added this example of
	an application using the modes.

	* src/hildon-marshalers.list: Added a new marshaller for the new
	signals.

	* src/hildon-pannable-area.h: Added new enumerations and flags in
	order to control the movement modes and the new signals to warn
	about the movements in the area.

	* src/hildon-pannable-area.c:
	(hildon_pannable_axis_scroll),
	(hildon_pannable_area_scroll),
	(hildon_pannable_area_motion_notify_cb),
	(hildon_pannable_area_get_property),
	(hildon_pannable_area_set_property),
	(hildon_pannable_area_map),
	(hildon_pannable_area_class_init),
	(hildon_pannable_area_init),
	(hildon_pannable_area_jump_to): Added the modes to control the
	movement in the widget. We have added properties to control it,
	signals to warn about the movements and refactored some code.