Move  into link text for MARC 856 links.

Closes #74 

### Before
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![before](https://cloud.githubusercontent.com/assets/96776/3461541/1150dabc-0224-11e4-996b-91e30eda7125.png)

### After
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![after](https://cloud.githubusercontent.com/assets/96776/3461543/18510ce2-0224-11e4-8e6f-d00349d14a2f.png)