8227135f3b
Tests and documentation will follow separately. The mixer elements in the opengl plugin need to stay in -bad for now since they use GstVideoAggregator. https://bugzilla.gnome.org/show_bug.cgi?id=754094
All aclocal .m4 files we need are put here and cat'd to acinclude.m4 in the source root. Official ones (taken from the relevant devel packages) are named as-is, unofficial ones (or changed ones) get a gst-prefix.