New DTS decoder.

New DTS decoder.

Original commit message from CVS:
* configure.ac:
* ext/Makefile.am:
* ext/dts/Makefile.am:
* ext/dts/gstdtsdec.c: (gst_dtsdec_get_type),
(gst_dtsdec_base_init), (gst_dtsdec_class_init), (gst_dtsdec_init),
(gst_dtsdec_channels), (gst_dtsdec_renegotiate),
(gst_dtsdec_handle_event), (gst_dtsdec_update_streaminfo),
(gst_dtsdec_loop), (gst_dtsdec_change_state),
(gst_dtsdec_set_property), (gst_dtsdec_get_property),
(plugin_init):
* ext/dts/gstdtsdec.h:
New DTS decoder.
* ext/faad/gstfaad.c: (gst_faad_sinkconnect),
(gst_faad_srcconnect):
Add ESDS atom handling (.m4a).