Beamfox Proximity ver. 1.2.5 ready for download

With the latest release, we have improved several parts of Beamfox Proximity including a new memory-handling algorithm for processing very large masks, improved visualization of complex polygons, fixing an erroneous entry in the material database (InSb and InAs are now correctly included), an optimized algorithm for improving the dose assignment to long, thin, and angled polygons, and finally a number of improvements to the user interface and overall user experience.