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Inhanced headings readme #343

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Bolts
*Bolts*
============
[![Build Status](https://img.shields.io/travis/BoltsFramework/Bolts-ObjC/master.svg?style=flat)](https://travis-ci.org/BoltsFramework/Bolts-ObjC)
[![Coverage Status](https://codecov.io/github/BoltsFramework/Bolts-ObjC/coverage.svg?branch=master)](https://codecov.io/github/BoltsFramework/Bolts-ObjC?branch=master)
Expand All @@ -22,7 +22,7 @@ Bolts includes:

For more information, see the [Bolts iOS API Reference](http://boltsframework.github.io/docs/ios/).

# Tasks
# *Tasks*

To build a truly responsive iOS application, you must keep long-running operations off of the UI thread, and be careful to avoid blocking anything the UI thread might be waiting on. This means you will need to execute various operations in the background. To make this easier, we've added a class called `BFTask`. A task represents the result of an asynchronous operation. Typically, a `BFTask` is returned from an asynchronous function and gives the ability to continue processing the result of the task. When a task is returned from a function, it's already begun doing its job. A task is not tied to a particular threading model: it represents the work being done, not where it is executing. Tasks have many advantages over other methods of asynchronous programming, such as callbacks. `BFTask` is not a replacement for `NSOperation` or GCD. In fact, they play well together. But tasks do fill in some gaps that those technologies don't address.
* `BFTask` takes care of managing dependencies for you. Unlike using `NSOperation` for dependency management, you don't have to declare all dependencies before starting a `BFTask`. For example, imagine you need to save a set of objects and each one may or may not require saving child objects. With an `NSOperation`, you would normally have to create operations for each of the child saves ahead of time. But you don't always know before you start the work whether that's going to be necessary. That can make managing dependencies with `NSOperation` very painful. Even in the best case, you have to create your dependencies before the operations that depend on them, which results in code that appears in a different order than it executes. With `BFTask`, you can decide during your operation's work whether there will be subtasks and return the other task in just those cases.
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