created configVarStack.by cloning configVarList.py
Started implementing ConfigVarStack
continued implementing ConfigVarStack
* New source file ConfigVarStack.py, currently not used.
* Some adjustments in ConfigVarList to future move to ConfigVarStack.
new source file pyinstl/configVarStack.py
new source file pyinstl/configVarStack.py
removed merged markers from pyinstl/configVarStack.py
merge from var-stack
* version updated to 0.9.10
    * Fixed: set-exec was not called or caled using the wrong have-info-map file if command was synccopy.