Consistent headline size across articles and live blogs

…also tweaks typography on football score headlines. Previously headline sizes differed across live blogs and articles. Headlines are now always 28/32 (`fs-headline(5)`) until the mobileLandscape breakpoint, to which they increase to 36/40 (`fs-headline(7)`). Example of score heading tweaks:

Before:
![screen shot 2014-09-22 at 17 52 38](https://cloud.githubusercontent.com/assets/813383/4360238/aad439c8-4279-11e4-85c4-4e62dd1d0474.png)

After:
![screen shot 2014-09-22 at 17 52 28](https://cloud.githubusercontent.com/assets/813383/4360240/b32058b4-4279-11e4-83d9-79e28c15bd10.png)