README update

Author: marmelroy

README.md

@@ -6,7 +6,7 @@
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 
 # ObjectiveKit
-ObjectiveKit provides a Swift-friendly API for a set of powerful Objective C runtime functions.
+ObjectiveKit provides a Swift friendly API for a set of powerful Objective C runtime functions.
 
 ## Usage
 
@@ -39,17 +39,15 @@ let protocols = mapViewClass.allProtocols() // Returns an array of protocols.
 
 ### Modifying classes at runtime
 
-ObjectiveKit to add / exchange methods for a class at runtime.
-
-You can add a pre-existing function from another class to your Objective class:
+Add a pre-existing function from another class to your Objective class:
 ```swift
 let viewClass = ObjectiveClass<UIView>()
 viewClass.addSelectorToClass(#selector(testSelector), fromClass: self.classForCoder)
 let view = UIView()
 view.perform(#selector(testSelector))
 ```
 
-Alternatively, you can add a method by providing a custom implementation with a closure:
+Add a method by providing a custom implementation with a closure:
 ```swift
 let viewClass = ObjectiveClass<UIView>()
 viewClass.addMethodToClass(closureName, implementation: {
@@ -65,6 +63,16 @@ let viewClass = ObjectiveClass<UIView>()
 viewClass.exchangeSelector(#selector(UIView.layoutSubviews), with: #selector(UIView.xxx_layoutSubviews))
 ```
 
+### Creating classes at runtime
+
+Lastly, you can also create a custom ObjC class at runtime:
+```swift
+let runtimeClass = RuntimeClass(superclass: UIView.self)
+runtimeClass.addIvar(ivarName, type: .Float)
+let runtimeObject = runtimeClass.allocate()
+runtimeObject.setValue(4.0, forKey: ivarName)
+```
+
 ## Setting up
 
 ### Setting up with [CocoaPods](http://cocoapods.org/?q=ObjectiveKit)