2.2.0

New features:

• date search expression can now find dreams based on arbitrary expressions
  like “yesterday” or “three weeks ago” (requires GNU date or compatible
  with the -d option).
• tabulate search expression allows easy generation of a table of matching
  dreams and arbitrary headers you select. See dr help tabulate for details.
• New -t switch to find search expression allows calculating the proportion
  of dreams matched.

Bugs fixed:

• Message no longer erroneously suggests running help dr instead of dr help.
• -f option to dr cat is now honored as documented.