Version 2.10.1

This is a patch update release to v2.10.0.
It has the following:

• Performance fixes for slowdown observed vs v2.8. Specifically,
  2D transforms for certain sizes showed significant slowdown.
  This issue has been fixed in this release. The fix also makes the
  performance in general better than v2.8.
• Code reorganization in transposes and performance improvements.
  There is a modest performance improvement with inplace transforms
  for large power-of-2 sizes.
• Several minor enhancements and bug fixes