Refs #364. Renamed the html() function to _html(). Changed all used of this function in the editor to align with the new name.
Refs #364. Added deprecated version of html() function.
Refs #364. Changed comment on deprecated html() function.
Refs #364. Made old html() function print a console warning on use.
Refs #364. Removed _innerHtml property in favor of just using _options.html
Refs #364. Updated CHANGELOG with notice of the deprecation of the html() function.
Merge pull request #364 from FriedRice/issue_364

Closed #364 Rename `html()` to `_html()` to discourage usage