* New: In Isobar::Script, scripts arguments are now passed through a
"keywords" argument (Python: **kw), that is a dictionnary.
To add *any* Python object to that dictionnary, uses the new
method Script::addKwArgument(const char* key, PyObject*).
The "cell" and "editor" variables are now passed that way.
This means that, for the editor, the old way of inserting
a symbol in the module global dictionary is no longer used
and the Python scripts must be modificateds.
* New: In Hurricane::PyCellViewer, create the Python link function
for translation from Hurricane to Python.
* New: In Unicorn, modifications for the new argument passing for
the Python scripts.
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