dvsource-alsa: Fix placement of VS and VSC packs

We used the correct block numbers for each sequence, but the wrong
pack numbers within those blocks.
Correct the standard cycle of samples per frame for 32 kHz audio

Also update the comment about this member to refer to the table in
the standard.
0010-happy-alsa.diff committed.
This helps building dvswitch manually. Not sure why the buildservice does not need this.
proxy started
Makefile always changes paths ...
documented dvsource-file algorithm
added to cmake,
Renamed to dvsource-alien, as it sources non-dv devices in a useful way.
code import completed from v4l2_grab.c into dvsource-alien.c
dummy audio track added. Apeears to work only for 48k
started proxy
git was unhappy with the delete. deleted again.
added tbuf_* code to dvsource-alien.c, still unused.
fixed space before tab.
untested but possibly complete code of dvsource-alien.c
compiler fixes
mixer should not blink it status bar per default.
V0.4 now with fully functional triple buffering.
Execllent performance. 30% cpu on my lenovo60s for a webcam.
I cannot wait to see that on a raspberry!
aa_render is now default. use -q to turn off.
-g now also accepts a width alone, and autcomputes a height for 4:3 ratio.
dvsource-alien V0.5 can now do cropping!
dvsource-alien -c parser now supports negative values, although this may lead
to segfaults.
dvsource-alien V0.6 added support for mjpeg webcams via stdin or url
works great with an android IP Webcam.