Add TODOs
Formatting
Add FlickrWrappr2 members and default parameters
Formatting
Rename: val accessCredentialsInputStream <- inputFile
Refactor: move method to class
Refactor: new method "loadPropertyFromFile"
Refactor: FlickrOAuthSession supports saved Token
Refactor: clear up "if-else"
Rename: val: (savedCredentialsFile <- credentialsFile)
Refactor: conditional assignment for "accessToken"
Refactor: add support for savedAccessToken