module Mattock

{Mattock::TaskLib} provides a base class to build tasklibs on so that you
can get to what you care about, and get option validation as well.

The convention that's added in Mattock is that Tasklibs are passed to each
other as arguments, so that behavior can be composed out of modular
components.

To define a new task lib: subclass {TaskLib}, add some ::setting calls, and
override #define to add some tasks.

To use your tasklib, instantiate with a block, optionally passing other
task libs to copy configuration from.

@example
    class CoolTask < Mattock::TaskLib
      settings :option_one, :option_two

      default_namespace :be

      def define
        task :cool do
          puts "I am so #{option_one} #{option_two}"
        end
      end
    end

    CoolTask.new(:args) do |t|
      t.option_one = "cool"
      t.option_two = "very"
    end

@example
    > rake be:cool
    I am so very cool

@example Composition
    transport = HTTPTasks.new do |t|
      t.server = http://mycoolserver.com
    end

    UploadTasks.new(transport) do |t|
      t.dir = "./source_dir"
    end

The configuration handling is provided by {CascadingDefinition}, and configuration options are built using {Configurable}