Add codemirror and codemirror tinymce plugin.
Add changenote, bump version, add minified kottiimage_plugin, remove minified codemirror plugin (because it's not picked up by the setuptools minify command).
Merge branch 'feature/codemirror'

* feature/codemirror:
  Add changenote, bump version, add minified kottiimage_plugin, remove minified codemirror plugin (because it's not picked up by the setuptools minify command).
  Add codemirror and codemirror tinymce plugin.
Bump version.
Merge branch 'release/0.4b3'

* release/0.4b3:
  Bump version.
Bump version.