Use a much finer beam than 1 degree.

New setting "BeamWidth" (ini file, no UI support yet.)
The radar comes back with possibly 4096 different rotations. They were mapped onto an array
with 1 degree separation (without averaging) before. Now we take every line into consideration
if BeamWidth=1, and ignore BeamWidth-1 scanlines if BeamWidth > 1.

Set BeamWidth to a higher value to reduce CPU usage, if needed.

The software automatically adapts and draws the correct image if the scanlines are fewer, as
in a BR24. 4G has been seen to send up to 2048 scanlines per rotation.
Implement course up mode.
Wider range for gain controls

Now have range 0-255 instead of 10-100. This might already work a lot better,
but it really needs (much) more work to get better controls.
Release 20130521