Release 1.9.19

Version 1.9.19

• Added '.xz' reading and writing support.
• Fixed ITE extraction issue.

Release 1.9.18

Version 1.9.18

• Dedicated ITE detection and CNF encoding for 'aigtocnf'.

Release 1.9.17

Version 1.9.17

• Dedicated XOR detection and CNF encoding for 'aigtocnf'.

• Added '-r' option for 'aigselect'.

• First output needs to be negated in 'aigor'
  (discovered by Gianpiero Cabodi in 2021).

• Reset types during reencoding (discovered by Sam Bayless in 2016).