make CMake module more idiomatic

Several minor modifications to import data workflow.

degree [°] and Angstrom [Å] characters were giving problems; temporary fix: isAscii function evaluates always to true.

Let CPACK_PACKAGE_VENDOR only show the corporation, not any subunit

GUI3D Implement 2DParaCrystal

This seems to be standard, at least for packages installed under
Windows.

Redmine issues 2177 and 2199: export to python and saving into plain array for 1d data 

Dedicate separate class for 2DParacrystal for containing lengthy 3D view lattice position computation function