[request] add authorize request.
Merge pull request #166 from formapro-forks/authorize-request

[request] add authorize request.
fix
[klrana] init commit.
[klarna] basic implementation.
[klarna] add the klarna invoice librarry.
autoload klarna's classes.
remove hard coded lib, use composer to resolve deps.
[klarna] add authorize action, set success only when activated.