Add option for Sass without Compass

I've implemented it such that you choose Sass. And then you're shown a confirm prompt asking if you want Compass. I've let the majority of the code remain the same in the templates the new Sass code is demarcated by `includeSass && !includeCompass`.

**Side by side comparisons**

Execution Time (2014-03-21 08:48:27 UTC)
    sass:server    342ms  98%
    Total 349ms

Execution Time (2014-03-21 08:47:20 UTC)
    compass:server  20.4s  100%
    Total 20.4s