Split multiple items in a single dt/dd into multiple dds...

...(instead of line-breaks).

This PR attempts to make this a global change for all repeating MARC/MODS fields that were perviously joined by line-breaks (although we may be missing some that'll crop-up over time).

Also, question for @jvine I have not added the `id` attribute to the `dt` and `dd` as in the desired output.  I wasn't sure if the ID was something you actually wanted (and I wasn't sure which identifier you were intending to place there if it needed to be explicit).

Closes #205 

### 571165
![815616-display](https://cloud.githubusercontent.com/assets/96776/3743305/5b296052-1776-11e4-8c4b-1dce17d91100.png)
![571165-markup](https://cloud.githubusercontent.com/assets/96776/3743304/5b290d28-1776-11e4-997f-07fca997970f.png)

### 815616
![571165-display](https://cloud.githubusercontent.com/assets/96776/3743307/5b2c5b68-1776-11e4-98f9-610f3af6b7bf.png)
![815616-markup](https://cloud.githubusercontent.com/assets/96776/3743306/5b2a0ad4-1776-11e4-9753-cbd116723b17.png)

### 485914
![485914-display](https://cloud.githubusercontent.com/assets/96776/3743309/5fdb76d0-1776-11e4-8954-e7f8e0bf2775.png)
![485914-markup](https://cloud.githubusercontent.com/assets/96776/3743308/5fda6c0e-1776-11e4-8895-e51a235eec9a.png)

### ps292jd8410
![ps292jd8410-display](https://cloud.githubusercontent.com/assets/96776/3743359/2dfc3d9c-1777-11e4-99f2-78ae0ed407d8.png)
![ps292jd8410-markup](https://cloud.githubusercontent.com/assets/96776/3743360/2dfcb600-1777-11e4-83f0-0dd8a41c6201.png)