Merge changes From Thomas Weiler / Rudolf Schimassek (KIT) to usertests:
"changed strings to lower case, as parName is given in lower case letters by pxar"

Some changes by me:
* remove commented out code lines
* remove added FLAG_FORCE_MASKED since this is default now
Fix last parameter PIX1 -> pix1 as pointed out by Thomas Weiler. Thanks!
Do not use hardcoded value for DAC_max since API provides nice dictionary
lookup for DAC range.
Merge branch 'master' into cython_manual_interface