Revert a474046..dfa976b

This rolls back to commit a474046986caf7f4da8888974c959ac8dfe794fd.
Revert f4b15ad..b7b6b19

This rolls back to commit f4b15adef1a79fec73ef7705c61b5c10e6577a12.
Revert dfa976b..6f63d27

This rolls back to commit dfa976b1a1566477aa4d8873d270b0372ad9bd38.
Revert f4b15ad..cb0ba33

This rolls back to commit f4b15adef1a79fec73ef7705c61b5c10e6577a12.
Add normalisation

and calculate only the contribution of one particle in mcstep