Force use of mdbook 0.2.1 as 0.2.2 is broken for now#7

Merged

therealprof merged 1 commit intomasterfrom

force-mdbook-0.2.1

Oct 22, 2018

Commits on Oct 21, 2018

Force use of mdbook 0.2.1 as 0.2.2 is broken for now
adamgreig
committed