Blender Git Loki

Update Makefiles for audaspace.

This add support for: sdl, ffmpeg, openal, jack and sndfile.
We have new options:
WITH_OPENAL, default false
WITH_JACK, default false
WITH_SNDFILE, default false

and with this:
NAN_OPENAL, default /usr

NAN_JACK, default /usr
NAN_JACKCFLAGS, default -I$(NAN_JACK)/include/jack
NAN_JACKLIBS, default $(NAN_JACK)/lib/libjack.a

NAN_SNDFILE, default /usr
NAN_SNDFILECFLAGS, default -I$(NAN_SNDFILE)/include
NAN_SNDFILELIBS, default $(NAN_SNDFILE)/lib/libsndfile.

Also add two new option on source/Makefile for jack and sndfile libs,
but only for linux, so let me know for other OS.