[TxMt] latex theme support

[Andreas Wahlin]

> I have only updated Brilliance Black. I'm not going to get around  
> to updating brilliance dull for a little while. I'm still planning  
> on a Brilliance White, too.  How interested are people in the  
> alternate versions?

I've been using brilliance dull for a while now (only in javascript  
since that's what I've been doing) and actually it's working pretty  
good :)
I'm not entirely sure I like the default "text" to be gray ... i'm  
not sure what would be better either, but grey just seems a bit dull  
and out of place. Other than that, it's pretty cool :)
I'm not in the least interested in brilliance white if it means white  
background, but if it's some sort of high contrast something or dark  
background with lots of white/snow like stuff, it might be interesting.

Andreas