Use standard scripts instead of MPD's custom implementation.

Ignore APE tags that have no usable tags, and use the ID3 tag instead.
This is useful when the APE tag only contains replay gain, and the
real tags are stored as ID3.  This implements feature request Mantis
#0003521.

These two strings are common "FILE" types.

No, really!  This fixes a regression of commit 74617389, which
changed the order of filter plugins.

GLib 2.16 was released more than 4 years ago.  Let's remove some cruft
from the glib_compat.h header, and avoid new cruft to it.

functions to new dsdlib. Update user doc.

Search and add search result to a stored playlist.

Conflicts:
	src/cmdline.c
	src/decoder/wildmidi_decoder_plugin.c
	src/gcc.h
	src/glib_compat.h
	src/input_stream.c
	src/output_list.c
	src/output_thread.c
	valgrind.suppressions