Version 1.0.0-rc.3

A few bug fixes, one with with possibly significant implications. See the issue #889 and commit fix for more details.

Bug Fixes

• Fix indenting beyond first level with toolbar #882
• Fix toolbar font/size display on Safari #884
• Fix pasting from Gmail from on different browser #886
• Fix undo/redo consistency #889
• Fix null error when selecting all on Firefox #891
• Fix merging keyboard options twice #897

Thank you @benbro, @cgilboy, @cutteroid, and @routman for contributions to this release!