Merge branch 'arthur'

Move the remaining special case toolbar functions to use execCommand.

Make toolbar nav commands use the same function as other edit commands.

Make sure that commands initiated from the toolbar and via command keys result in the same command string. Previously some of the toolbar commands used the 'edit' prefix where they should have used 'para' or 'style' etc.

Update the in app license text.

Fix license text.

Add licensing for the svg editor plugins. This should have been there all along.

Change license.

Corrections to quink homepage html

Tidy.

Fix markup error. Remove toolbar markup that is no longer used.

Refactor to move some more code into the toolbar provider.

Tidy.

Split out the toolbar config code into a new file.

New example to show configuration from a host page.