adding line breaks to improve formatting

Mainly focuses on adding line breaks to the references example so that it doesn't run off the right of the page.  

Also: 
* adding some breaks to the usage notes of accrualPeriodicity
* shortening the keyword example

![screen shot 2014-08-15 at 11 22 29 am](https://cloud.githubusercontent.com/assets/633088/3934949/9a6f00c4-2490-11e4-9848-f4eee3543f42.png)