fix for temper_grem exchange probability

Remove unneeded restart_peratom flags in USER-DPD package

bugfix for irregular::create_atom and create_data

improve memory usage reporting in info and output class

Add utility to detect duplicate anchors in docs

Library interface fixes, Python example fixes and better Python 3 compatibility

Added fix filter/corotate.

This reverts commit 8e75616c.

The interface of that function has changed and includes two additional
parameters, which haven't been added to the Python interface either.
This showed up by trying to run the simple.py example.