fixing unrealistic polygon mirror deflectors (#39)

* fixing unrealistic polygon mirror deflectors:
now uses maxScanAngle_deg for estimation of angular space between pulses
now uses min(scanAngle_deg, maxEffectiveScanAngle_deg) for limiting pulses (anything above these values is discarded)

* adapted parameter scanAngleMax_deg for different rotating polygon mirror scanners

Co-authored-by: Hannah Weiser <[email protected]>

Author: lwiniwar