a shiny new variant.

ok, here we go.. this is a new variant called "Be Social!".

I've also added the avatars on message & boardindex by default, but made them invisible via CSS. Not sure if Ant wanted them, thus they aren't visible.

Screenshot is attached, hope you like it..
![be_social](https://f.cloud.github.com/assets/1027992/1849786/77f300f8-76bd-11e3-9c97-369986c1a5d1.png)

It still needs some work, but I think it's a good start and we can ship at least two full featured variants for our default theme (light and this one).