Updates the Readme

Adds Information in the Readme for:
* Testing
* Default Setup
* Customization Setup
* Required vs. Optional Attributes
* Methods for Optional Attributes
* SerializerIgnoreException
* SerializerMissingRequiredException
* Reporting Issues
* Development of the App
Closes #5

Signed-off-by: Justin Yost <justin@loadsys.com>
Adds Build Status Icon to the Readme File

Signed-off-by: Justin Yost <justin@loadsys.com>