Translations:Material/13/en

Material.py
Since handling material-properties is a tedious work we should implement a Python front-end module calls Material.py. This will be the place to implement all kind of helper methods for material handling.
 * Calculation of Mass out of Volume and Density
 * Translation in different unit systems
 * Calculation needed in special application (e.g. FEM)
 * and anything else we don't know yet