Fixes to the threshold edge finding algorithm by Jan Hoss:
* Should be able to cope with jittering edged
* Should be able to detect thresholds which start w/ 100% efficiency at DAC 0
First check if we have a threshold for the pixel and then search the result
vector. Should be slightly faster, since found is shorter.
"Threshold is 0" is only true if we look for rising edges. Otherwise we would
always get zero threshold for all falling edge scans.
Merge branch 'master' into threshold_finding
small syntax corrections
made testboard function Sig_SetMode accessible in api to control DTB signals
Merge branch 'master' into threshold_finding
Merge branch 'threshold_finding' of github.com:simonspa/pxar into threshold_finding
remove another serial
restrict dumping of  problematic histograms with flag
API INTERFACE CHANGE: setSignalMode now accepts strings instead of
register addresses. Use same as in "setTestboardDelays()".
Adapt python interface to new API setSignalMode
Add setSignalMode to Python CLI
minor output modifications
remove unneeded scurve scans; VTRIM now determined with 2D scan; trim time for a complete module now at 20 minutes
Merge branch 'master' of github.com:psi46/pxar
more changes to the Fulltest and trim test
add protection against corrupt pixel addresses
simplify catches; improved consistency
simplify catches; improved consistency