Even more statuses
Adds getAccessToken method to IntegrationTestsConfig class
First version of Pocket client with (limited) addItem capabilities
Adds some tests for add method
Removes title parameter from addArticle method as it is not used in API
[refactor] Renames AbstractPocketResponse to AbstractAuthorizationResponse
Configures Gson to work with camelCased Java fields and underscored Json fields
addArticle now returns response object