adds genre mods display and also moves subjects to dt/dd (mods only)

Fixes #241 

![screen shot 2014-08-01 at 10 31 28 am](https://cloud.githubusercontent.com/assets/1656824/3782422/c841fbc2-19a1-11e4-9bb1-2440436a7e3e.png)

![screen shot 2014-08-01 at 10 32 03 am](https://cloud.githubusercontent.com/assets/1656824/3782423/cae026e2-19a1-11e4-9da0-1679c6b3253f.png)

Specced per discussion with @jvine