[Cc-webedit] WYSIWYG editor

[Jon Leighton]

Hi all,

As we discussed at the weekend, I have now changed our WYSIWYG editor
from FCKEditor to TinyMCE.

TinyMCE is better regarded in terms of accessibility features, and has
some handy configuration options for restricting input. For example, I
have now implemented a whitelist of allowed HTML elements and
attributes, along with an automatic filter for pasted content. This
should help people adhere to the style guide more easily.

Please let me know if you spot any bugs with the whitelist or otherwise.
I will update the style and CMS guides accordingly.

Cheers,
Jon