- changed version number from 2.0.0a to 2.0.0 to avoid problems with package require - found crashes in deletion order (when tcl implicitly deletes xotcl objects), introduced temporary compile flag OLD_DELETE
- removed XOTclCallStack definition and datastructures, when compiled with TCL85STACK - CallStackPop(): when compiled with TCL85STACK, the function just initializes a given call stack content; allocation based on C-Stack