Merge pull request #1 from sergione76/master

Fix DataGroup Length Indicator bug

It's inserted in the same X-PAD field of the first MOT segment
Write DSE at start of AU

To respect the ETSI standard for XPAD in DAB+
Add a check to mot-encoder for allowed padlen values
Fix README.md syntax
Prepare release 0.3.0 with MOT slideshow and DLS support
Accelerate slideshow transfer

This patch skips the transmission of Content-Type, which gives more bits
to the transmission of slide content.

Signed-off-by: Matthias P. Braendli <matthias.braendli@mpb.li>
Add ZMQ CURVE auth support
Add option to suppress the little dots
add -s to getopt_long
remove old piece of commented code
dabplus-enc-file: replace little dots by nice level indicator
remove s from getopt
replace dots by level in dabplus-enc-alsa-zmq
Use new zmq message format version 1
use new message format for file encoder too
merge file and alsa encoders into dabplus-enc

There was a lot of redundant code between the two
Always print underruns and overruns
Prepare for v0.4.0
Make the file output actually work
Don't insert stale PAD data when the read returns 0