- also some sorting
* remove redundant void-arg * use nullptr * replace deprecated headers
+ some are doxy others are just comment code. + some minor whitespace and grammatical tweaks. + app/SCL/* typos have also been submitted upstream (https://github.com/stepcode/stepcode/pull/366). So it's ok to merge them in to master.
git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5000 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d