Add or remove colors for LSL code in pre blocks
This adds two buttons for the rich text editor (TinyMCE) on community.secondlife.com. pre blocks (like those from the insert code button) will be highlighted assuming LSL. There is also a button to remove the highlights, in case the formatting looks wrong, or the style tags make the post too large. Right now this is an all or nothing operation, all pre blocks in the post or none will be highlighted. That could improve in the future, if I can find a nicer way into the iframe. Currently tested on Firefox and Chrome.
