move old files to separate folder
Merge branch 'master' into developer
translation of ring and radius change
implement multi-ring - first stage
attempt at improving multi-ring
working version of multi-ring
add commenting to parameter

Now fully functional multi-ring implementation, with variation of charge
various updates
add first try of poynting, and introduce 3D
further tests
addition of charges program, and division in folders
further improvements
Merge branch 'developer'