Releasing 1.1.20, with extended Computed support.

Version 1.1.17 released.

Runs added to Sec. 10+11 examples.

Releasing v1.1.13.

Token bug fixed.

Fixed literal token parsing bug.

v1.8.8!

Undo lecture changes.

Manual H1-5,10 proof read.

Worked through last example in manual.