Merge branch 'hprefine_curvedels_eval' into 'master' fix in hprefine curved elements trafo (coarse_xi can be size==1) See merge request ngsolve/netgen!724

Access registered archive classes from python for debugging

Fix comments after ifdef clauses

Revert "Add search path to occt libraries" This reverts commit 7ac609cbefa6db19755a548d009c2f84861fa90a.