Make RunnableTask easier to use

[KenSuenobu]

Instead of using the notation:

    JobBuilder()
        .withTask(new MyTask() with RunnableTask)

I would like to use:

    JobBuilder()
        .withTask(RunnableTask(new MyTask()))

or something a'la Monix Task:

    JobBuilder()
        .withTask(RunnableTask { ... code here })

[KenSuenobu]

Option #2 is already available; Option #1 allows you to wrap the class with a RunnableTask trait, while maintaining access to its member methods and variables. Option #3 is fairly limiting, as it's simply elegance for writing a RunnableTask with some defaults, and a wrapped run() method within a block.

[KenSuenobu]

This has changed slightly. It's not a RunnableTask that has the ability to create a simple task - it's Task.

You can now do:

    val task1: Task = Task {
        // Do task code here
        // Do some more task code here
    }