Add recursive retry to cookbook

[briancavalier]

See #426

[rkaw92]

You might want to take a look at https://github.com/rkaw92/when-retry for an example of a configurable retry strategy.
Just put any code that delays the retry / gives up in a trampoline and pass an instance of it to the RetryStrategy factory.

[briancavalier]

Nice, thanks!