Install Font Awesome plugin to TinyMCE

Note. By default TinyMCE stripes out some tags and attributes. Please add this option to your initialization script:

extended_valid_elements : "span[*],i[*]",

Unpack archived files directly to tinymce/plugins.
Turn on the plugin in initialization script:
```
plugins: 'jsplus_font_awesome'
```
Add these buttons to the toolbar definition:
- jsplus_font_awesome
  Insert Font Awesome icon
See sample TinyMCE toolbar configuration manual.
Now you can use your installed plugins. Do not forget to sure that browser cache was cleared.