(freecad) added possibility to locally install the brepconverter git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@15401 cec4b9c1-7d33-0410-9eda-942365e851bb

(freecad) updated README file, added install target to the brepConversion makefile and the calling of 'brep_to_xml' so that it could be accessed globally git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@15360 cec4b9c1-7d33-0410-9eda-942365e851bb

(freecad) new directory names git-svn-id: https://svn-agbkb.informatik.uni-bremen.de/Hets/trunk@15356 cec4b9c1-7d33-0410-9eda-942365e851bb