API for OptionList

Added an api for OptionLists
http://topliners.eloqua.com/docs/DOC-3405

Unlike the CustomObject and Bulk API, this was really straight forward - I'm hoping the only issues that are found are documentation or format related.
Think I'd prefer to keep the "back to nav" tightly coupled to the top of the page.  Description can go right below.

- [ ] Done