Merge Marc's PR #6 that fixes issue #5, plus a few other tweaks that were waiting to be committed on my local source.
Increment version number (I need to remember this earlier!)
Upgrade CKEditor to 4.1.2 and tweak some inline mode CSS.
Add config option for CKEditor 'extraAllowedContent'
Add support for enabling/diabling ACF and HTML Purifier. If you upgrade to this version, edit each of you CKEditor fields (Setup > Fields > [your_textarea_field] > Input > CKEditor Settings) and confirm the new settings are what you want and hit "save" to commit them (even if you haven't changed them).
Add support for the CKEditor format_tags configuration option.
Add background color #fff to the inline editor, for better appearance in Teflon and presumably other themes.
Update to support the 'rows' field, enabling you to specify the default editor height. Applies only to regular mode, as inline mode already sizes to the content height.
Fix issue #8 with Anchor button not working. Also update CKEditor to 4.2.0 and tweak a few settings.
Add some code to automatically fix the Anchor issue for existing installs, so folks don't have to manually adjust their field settings.