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)

Make a few servers conditional on ctrl file
Improve some socket logging.

Small fixes to trace code and trace server.

Use it for block parameters.
Use it for ethercat frames. (non pdo)
Use it for vesp commands.

Trace server capacity is now based on actuall number of outputs,
not on some magic number.
Add name and unit option to command_bool and command_float.
Modify tests to test this.

	modified:   controller/dt_ctrl.c

o Add include for 'controller_time.h' for the definition of the
  controller_time_process() function.
o Make it more clear that we want the function to return 0 on success.

Small fixes to trace code.

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

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

Add poll/recover to bus

Modify idle loop of dt_ctrl to poll all busses and recover when
needed and possible.

Split esc (ethercat slave controller) code into seperate modules.
Add code to read SII eeprom of esc devices and use it for
device initialization.
Add per device thread for monitoring/recovery of devices.

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

A few improvements from the Vitsch Electronics CVS
Use log_send() for all logging and add context (DEBUG/WARNING/ERROR) info.
A little bit more comments

Mostly ethercat related in the ec directory.

Also fix some reentrancy issues in the controller_load functions.