Added full set of H1-H6 buttons to MD editor
Allow per-field markdown toolbar customisation
Do not crash process for schema validation errors
Throw actual mongo error
Merge pull request #659 from davidbanham/validation

Don't crash process on schema validation errors
Updating Changelog
v0.2.30
fix for bug #536
Merge pull request #660 from ianbjorndilling/bugfix-536

Custom deletion hook error messages: issue #536
Merge pull request #606 from albertogasparin/md-editor-headers-buttons

Markdown editor headers buttons and customisation
Merge branch 'master' of https://github.com/JedWatson/keystone into deletehooklocalfile