Swapped airline colors

I don't know if its global issue, but with my theme it looked like the other tab is selected. Not sure if it will work with all themes, guess it  would be best to keep `win` colors same as the background bar color, and change only `cwin`. Maybe you can check?

**Before:**
Which one is selected?

![](http://cl.ly/YG8w/Image%202014-10-28%20at%207.55.23%20pm.png)

No, you're wrong, it's the second one.

**After:**

Now you can tell at least:

![](http://cl.ly/YFn1/Image%202014-10-28%20at%208.19.31%20pm.png)