Added a way to get a call to the fake after it have been called, instead of before.
It properly goes through the unhandled calls in order.
Added the {now:true} functionality to the `callsArg()` code.
Added `{ now: true }` support for callsOriginal.
Added the new functionality to the readme file.
Added support for handling the calls after they happened, instead of requiring handling before.
Cleaned the readme and bumped the version.