Merge branch 'release/0.4b2'

* release/0.4b2:
  Bump version.
  Minimized js file.
  Added show preview checkbox. Renamed onSubmitForm() to setImage(), and wired this to the new checkbox.
  Moved image scale selection to plugin dialog. Added url and label updating methods. Removed redundancy in button labels (now OK, was Insert Image). Added tooltips.
  Restored ImageDialog reference.
  Changed the scale input to a dynamic input. Added missed plugin file.
  Added kottiimage plugin, loaded on tinymce init, which allows reworking of initial image dialog. Also making changes to Kotti browser dialog.
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' into production

* release/0.4b3:
  Bump version.
  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.