Update HISTORY.md

Reformat and link to wiki.
Merge branch 'master' of github.com:yui/yui3 into dev-master
Clarify `broadcast` config desc, fix broken link

Fixes #2531579
Merge branch 'live-docs' into dev-master
Merge branch 'dev-master' into dev-3.x
Merge branch 'dev-3.x' into dt-editable
A half-way backup.