Updated some of the constants. Created the UserContacts and Contact classes. Updated the gitignore to ignore my private test library.

Signed-off-by: Adam Yeager <adam.yeager@gmail.com>
Adding the create contact method.

Signed-off-by: Adam Yeager <adam.yeager@gmail.com>
Merge branch '1.1.0' into Contacts
Added methods to add, update, and delete contacts.

Signed-off-by: Adam Yeager <adam.yeager@gmail.com>
Updated the constants file with HTTP methods. Updated the unit tests with examples of adding, updating, and removing contacts.

Signed-off-by: Adam Yeager <adam.yeager@gmail.com>