ext/nas/: Bunch of nassink clean-ups: make build by adding the right CFLAGS and LIBS...

ext/nas/: Bunch of nassink clean-ups: make build by adding the right CFLAGS and LIBS to Makefile.am; rename structure...

Original commit message from CVS:
* ext/nas/Makefile.am:
* ext/nas/README:
* ext/nas/nassink.c: (gst_nas_sink_get_type),
(gst_nas_sink_base_init), (gst_nas_sink_class_init),
(gst_nas_sink_init), (gst_nas_sink_finalize),
(gst_nas_sink_getcaps), (gst_nas_sink_prepare),
(gst_nas_sink_unprepare), (gst_nas_sink_delay),
(gst_nas_sink_reset), (gst_nas_sink_write),
(gst_nas_sink_set_property), (gst_nas_sink_get_property),
(gst_nas_sink_open), (gst_nas_sink_close), (NAS_flush),
(NAS_sendData), (NAS_EventHandler), (gst_nas_sink_sink_get_format),
(NAS_createFlow), (plugin_init):
* ext/nas/nassink.h:
Bunch of nassink clean-ups: make build by adding the right CFLAGS
and LIBS to Makefile.am; rename structure, macros and functions
according to canonical naming scheme; move some things around a bit;
use GST_CAT_DEFAULT instead of GST_CAT_* everywhere; remove README
file that didn't really contain any useful information anyway (the
useful bits have been moved into the 'host' property description).