MacOS: Description for creating a desktop shortcut added
MacOS for Tutor OK
Urgent bugbux compiling some extra programs
{darwin} is the hbp macro to activate code for MacOS
Added handling of origin path for all programs
Little docu corrections for hwg_ChDir() and MacOS
New function hwg_ChrDir(), handle origin path and name, MacOS (continued)
Samples running OK on MacOS