Methods to read input files

VisuDataLoader — a base class for all load methods.
atomic_d3 — Method to load d3 position file.
atomic_ascii — Method to load ASCII position file.
atomic_xyz — Method to load xyz position file.
atomic_yaml — Method to load YAML position file.

Main purpose of V_Sim is to render some file describing positions and other informations n a graphical way. This is achieved implementing VisuRendering. Currently two methods exist, one draw spheres (or other geometric forms such as cubes) on defined positions. The other is a more specialised version of the former, adding a direction information on each position. This method is called SpinRendering and is usefull to render spin configurations.