Merge pull request scicloj#85 from scicloj/add-clay

Add clay dependency

updated status to beta stage

typo

version "2-alpha12"

version "2-alpha11"

version "2-alpha10.1"

Merge pull request scicloj#59 from scicloj/emmy-viewers

added Emmy viewers

version "2-alpha9.3"

version "2-alpha9.2"

fixed book dev script