Dropping the backronym from the page title.

It was suggested on twitter that one of the reasons why we see "SASS" so much is that the title of the website is misleading. The acronym was just a backronym and was never meant to be taken seriously.

In this pull request, I am proposing that the best thing for people to see when searching for the Sass lang site is "Sass - The CSS Extension Language'--- I think it frames Sass much better and is very clear about our relationship to CSS. There are cuter names that we use for Sass {style with attitude}, etc. but I think being more clear in the title is much, much better.

I'm not saying its perfect, but I think its better until we are ready for the new site.