documentation: minor changes and updates of docstrings

regrid: Added many scripts for regridding by Jörn
logging: Introduced logging
scripts: Added Scripts for regridding and simulating stuff for cooperations
removed: Unused test scripts
structure: Many new restructuring aspects already implemented

modularity and compatibility with future algorithms and ideas.

(At the moment a bit slow, optimization with Cython seems necessary).

Replaced res with a for the grid spacing
(resolution is a reserved word in electron microscopy
Work in progress: jacobi matrix for projection