Include the active state for modifiers within KssStateGenerator

[dewski]

In my current use of KSS I have modified the Coffeescript to generate the class names for the element's active state that could be useful for others.

[kneath]

I realized that I really need to rethink how this javascript works. Notably, there's some problems:

• No easy way to support a bunch of different pseudo classes
• Gets confused if there are multiple pseudo-states in one line, like .test:hover, .test.really:hover (only the first will get a rule generated)

So I might see if I can find a more generic way to solve this stuff instead of just adding to the conditional.

[kneath]

Ended up fixing this in e2d2453