gui: First version of PolarOverlay
Merge branch 'master' of delmic-server.local:odemis
gui; Added Phi and Theta indicator rendering to PolarOverlay
gui: Added Phi, Theta and Intensity label rendering and value calculation to PolarOverlay
cli: add --machine argument to disable pretty-printing

useful to parse output by a script

the end goal is to allow auto-completion
install: add auto completion for odemis-cli

not perfect, but already much better than nothing

autocompletion script based on the xrandr autocompletion script
semcomedi: fix long dwell time with NI cards

Don't expect the DAQ board to accept timed commands of up to 2**32 ns. Some hardware can have
stronger restrictions. So we now read it at initialisation.

Actually, the longest dwell time our NI card supports is ~0.8 s (0xffffff * 50 ns).
Everything above needs a "duplication rate".