Conditional Stylesheets

I was wondering if Casset supported conditional stylesheets? For example I need to output certain stylesheets depending on the browser being used.

It seemed a bit counter intuitive to use Casset for all of my stylesheets except for the odd

``` html

```

I had a dig through the docs and code and didn't spot anything which looks like it does this so I'm assuming it doesn't. If this is indeed the case, is this something you're planning for the future?

Start by reviewing the documentation and the stylesheet-related code paths mentioned in the issue to determine whether browser-conditional output is supported. Define the expected interface and output behavior for conditional stylesheets, including the IE-style example, and document or test the result; no specific files or tests are named.

Written by the indexing model from the issue text.