Allow selection of toolchains with --host and --build options in configure.

Console building can be switched on and off.
console_httpd and console_j2000_indi are now built only if all libs are
found.

Getting a working build:
1. run autoconf
2. run ./configure
3. make as usuall

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.

This makes testcases more reliable and enables us to find stupid time
calculation mixups.

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.

It can now be used to make a dump from a trace stream on stdin.
Nice for taking a quick look at traces which were dumped to disk first.

Remove now unneeded nsec base time.
Command handling in the sample now uses trigger time.
Trace handling still has to be done, then all nsec timers can be removed
from the sample.

Sample counter removed from time interface. Only ec.c used it and it did not
add anything useful.
While sample is running trigger is now responsible for timestamps and
translation to wall clock. (allows external clock/trigger sources).
Log functions now log sub-second timestamps.

Default is set to true, if set to false console_httpd will directly connect
to the controller instead of the proxies.

Add test for quadrature decoder and optimize it a bit.

Optimize oneshot block a bit.

Add test blocks for sint32 inputs and outputs.
Also add tests for them to test.ctrl

(localhost resolves to ipv6 and ipv4 on video...)
Modify trace file dump to only 100k now the trace is more efficient.

  command line option '--history [seconds]'. The default is still 60
  seconds.
o Add a command line option '--interval [seconds]' to set the sample
  interval. The default sample interval without the options remains 0.2
  seconds as before.
o Add '--host [IP address or hostname]' command line option to view traces
  on a remote machine.
o Add '--port [remote port number]' command line option to specify the port
  number of the trace server to connect to.
o Add usage() function to inform user of possible optins.
o Keep track of the lowest and highest values in a plot and adjust the y
  range to be just over min and max so that all samples will fit within the
  plot, without the highest and lowest values dissapearing under the borders
  of the plot.

	modified:   common/trace/trace_view.c

Optimize oneshot block and bridge_pwm block:
	-minimize amount of branches by removing sequence points.
	-Use local variables for structure fields to minimize dereferences.

compatibility code from controller_block.
Not having a create struct will now lead to failure to load the ctrl file.

	modified:   controller/block/block_quadrature_decoder.c

	modified:   controller/block/block_counter.c
	modified:   controller/block/block_debug.c
	modified:   controller/block/block_gain_var.c
	modified:   controller/block/block_inverse_proportional.c
	modified:   controller/block/block_random.c
	modified:   controller/block/block_sine.c
	modified:   controller/block/block_trajectplayer.c
	modified:   controller/block/block_trajectplayer.h

	modified:   console/winrotor-usb/winrotor-usb.c

Handy for testing, or scripts.

Add a little bit of logging.

	modified:   console/console/spg_auth.c
	modified:   console/console/trace_proxy.c

	modified:   block/block_oneshot.c

	modified:   block/build.mk

When its 'reset' input is active, the output will always be off (=false).
When the 'set' input is active, the output will be turned on.
Once the 'set' input becomes inactive, the output will remain on for 'period'
seconds and then turn off.
A parameter called 'force' allows the block to be forced into the 'set' or
'reset' states.

	new file:   block/block_oneshot.c

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.

A lot simpler than the 1d and 3d setpoint generator and perfect for
temperature settings ;)
Add test for command_float block.

With this, we can create e.g. an oscillator module that only has an output,
but no inputs.

	modified:   controller/controller_load_parser.y

	modified:   controller/controller_load_parser.y