Introduce track command in 3rd order spg.
With this command the spg is set to track the 'track_x' input but will
still honour all limits (v, a, j, x)

Add some build flags to make more stuff switchable.
Fix delay setting for rs485 in block_vesp_tty. (prevent hanging serial port).

Add and4 variant.
Fix memory allocator alignment, it was to enthousiastic.

Remove azimuth safety block.
Remove now useless dt_azimuth directory.

Add range checkers to take over azimuth position range checks.
Add test for new block.
Remove some more logs from the az_safety block.

Use log block for logging DT HW position switches.
Remove hard coded logging from safety block.
Leave the rest of the block intact for now.

The frequency keyword has been removed.
The blocks keyword now needs two arguments: frequency (Hz) and delay (seconds)

Now it is possible to add parameters multiple times and we no longer depend
on the location of the parameter in the list.

Introduce first two position aliases
Allow string variables to be used almost anywhere

Use immediate trigger in test.ctrl files.
Fix some bugs

Various small fixes
Add command protocol to websocket
Add cross compiling with 'TARGET='
Fix some issues with ARM

Increase maximum azimuth speed to 2500 rpm
Change show position to 30,30

This allows both the azimuth and the elevation control file to include the
ethercat device

Add speed warning to azimuth controller.

ctrl & param file: Update to match old dt configuration (with limited speeds)
Small fixes to stoeber code for correct initialization (pdo settings)
Add check for 'zero' state in esc.c
Make sure recover mode overrides all needed variables in el safety block

more readable.

Update simulator networks to have proper quantization
Add pi constant

We can now use gear ratios. This makes parameters much more readable.

Also a small bugfix in the sample timing shell commands

Also some changes to properly log to console when no slaves are found

Also fix some reentrancy issues in the controller_load functions.

-Safety blocks have some names changed
-Setpoint generator is redesigned.
 +No longer 'unitless' with 'd' as derivative, but physics names (x, v, a, j)
 +Removal of 'mirrored' code.
 +improved tracking at high speeds
 +Addition of 'precision' parameters to limit numerical noise