Added codemirror plugin to tinymce v4 used in Umbraco7.
This is a tinymce plugin to seamlessly use the already existing code mirror package in umbraco as the source editor.
The tinymceconfig.config is updated to seamlessly replace the code plugin with the new codemirror plugin. (And the user can switch back to code here if they need to for some reason.)
Fix for dialog size logic.
Fix for css not associated with legend.
Merge branch 'tinymce-codemirror' of https://github.com/pynej/Umbraco-CMS into pynej-tinymce-codemirror
updated some of the table styling, updated the path to be relative and updated the release config.