- Include the eclipse_io.cpp file in existing extension library - do not create
a new library.
- Remove Python class EclFile - just expose the C++ through Pybind1, include
some monkey-patching of the class to ensure proper Python strings for CHAR
keywords.
- Remove string based keyword lookup.
- Use standard Python methods __len__, __getitem__ and __contains__; get() is
an equivalent alternative to __getitem__().
- Add property arrays in addition to getListOfArrays()
