includes example of usage
should replace material.py, after the tests
have been confirmed to work with it
mat=damask.Material()
m=mat.example_1()
m.write(file='material.config_<descriptive-label>')
added dislotwin law to hex elastic test and drastically increased loading time. still the question why Young's modulo is increasing.
added possibility to add crystallite microstructure in material.py