Time to add some data classes, and add more test cases.

I've decided to break up the next bits of work into several blog posts.  The posts are described as follows:

• Adding a container class for auth credentials
• Adding data classes for twitter update status payload, and responses.
• Adding more test cases.  

I have one branch for all these changes: 

https://github.com/lightmanca/TheTestFrameworkBlog/tree/twitter_add_data_classes

So without further ado, here we go...