Freeze versions in Dockerfile

See merge request dijkema/dt_ctrl!9

Apparently libwebsockets 3.0.0 does not work; pulling latest versions in
Dockerfile is a bad practice. I'll make an issue about the breaking
libwebsockets.

Fix url in Dockerfile instructions

Closes #2

See merge request dijkema/dt_ctrl!8

Fixes #2

Add rise and set indicators to satellite view

See merge request dijkema/dt_ctrl!6

(including simulator)

:wq

Create network with spg and pid

Add deadzone test

Systick trigger working.
New deadzone block.

using:   $ ./configure --host arm-none-eabihf --disable-vesp --disable-am335x --disable-ethercat CFLAGS=-specs /usr/local/arm-none-eabihf/lib/atsamx70x21_flash.specs
(add quotes to spec argument)

luckily we never needed it.

Some user interface improvements

See merge request dijkema/dt_ctrl!5

trace2port and dockerfile

See merge request !2

Currently only supports ex2, but more can be added similar to andN.

Modified dt.ctrl to use the ex2 block to prevent simultanious activation of
focusbox outputs.

Made and block calculate functions status to prevent conflicts.