#567034: Do not take inheritance into consideration while checking text area visibility. This allows bueditor install on text areas that are invisible by parent.

- #396572 by andypost: introduced 'administer bueditor' permission replacing 'administer site configuration'.

- make editor methods chainable allowing callbacks such as E.replaceSelection().focus().makeSelection()...

Single line javascript comments in default buttons converted to multiline as safari 4 seems to have a bug with it.

- %THEME placeholder alternatively points to the default theme when icon or library path is missing for the current theme.

#364026: make bueditor insert its setting into Drupal.settings in order to support elements coming from ahah.