You are missing the point on using Tcl_CreateObjCommand, I didn't mean
to just go and and do s/Tcl_CreateCommand/Tcl_CreateObjCommand/ because
if you are going to convert everything to unicode then there is no point
in using Tcl_CreateObjCommand.
Also, Tcl_ObjCmdProc should use Tcl_Obj *CONST objv[] instead of Tcl_Obj
*const objv[] because Tcl may define CONST as nothing, and it uses CONST
when defining Tcl_ObjCmdProc.