Remove Haali DirectShow support.

It had become a burden rather than an asset, especially since
the Haali splitter itself is rarely - if ever - updated,
and [most?] users (should) have switched to LAV Filters already.

The Haali Matroska parser remains, because it's separate from
this mess.  Maybe it should be removed too, but this comes first.
Regenerate buildsystem after Haali removal.
Merge branch 'haalinomore' into cplugin_haalinomore

Conflicts:
	Makefile.am
	Makefile.in
	aclocal.m4
	configure
	configure.ac
	ltmain.sh
	m4/libtool.m4
Remove Haali stuff from the C-plugin to match master.

I didn't actually think the C plugin could use the Haali DirectShow
filter, but maybe it actually could.