Rigel 1.13.1

• Set GPU memory clock offset to 0 when building DAG to prevent its corruption
• Add {ts} and {algo} template parameters for log file name (see --log-file in readme for more details)

Bug fixes:

• Large amount of rejected shares when mining kawpow to Nicehash
• (RXD) Fix performance regression on Pascal GPUs introduced in version 1.11.1