Merge core-8-5-branch
Now compiled with "novem", except for the function Tcl_VarEval().
merge core-8-5-branch
don't crash if Tcl_FindExecutable cannot be called
don't compile with TCL_NO_DEPRECATED (otherwise Tcl_[GS]etStartupScript could be taken from the public stub table with Tcl 8.6)
more minor tweaks, getting it to run with Tcl 9.0 when compiled against 8.5 or 8.6 headers
Seems working completely against "novem" now. Only tested on win32 and linux yet.