Changes in nauty 2.9.1:

• uniqg was modified to give the same hash codes on little-endian and big-endian computers. Thanks to Jerry James for helping with this.
• A buffer overrun in dreadnaut introduced in version 2.9.0 was fixed. Thanks to Jerry James for identifying it. This did not impact any programs other than dreadnaut. The bug was also present in 2.9.1rc1 and 2.9.1rc2 but was fixed in 2.9.1rc3.

All other builds are simple rebuilds due to the nauty update.