Added license and readme.

Author: bnickel

LICENSE

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+An Objective-C port of Pagedown's Markdown.Editor.js, as used on 
+Stack Exchange.app.
+
+Largely based on showdown.js by John Fraser (Attacklab).
+
+Original Markdown Copyright (c) 2004-2005 John Gruber
+  <http://daringfireball.net/projects/markdown/>
+
+
+Original Showdown code copyright (c) 2007 John Fraser
+
+Modifications and bugfixes (c) 2009 Dana Robinson
+Modifications and bugfixes (c) 2009-2014 Stack Exchange Inc.
+
+Objective-C port (c) 2009-2014 Stack Exchange Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+SEMarkdownEditor
+================
+
+SEMarkdownEditor is a port of [Pagedown's Markdown.Editor.js](https://code.google.com/p/pagedown/source/browse/Markdown.Editor.js) transformation logic to Objective-C.  While this does not provide rendering capabilities, it does allow you to create a full-fledged markdown toolbar for your `UITextView` similar to what you would see on StackExchange sites.
+
+Example
+-------
+
+Performing any transformation is a matter of getting the text and selection information from your `UITextView`, performing a transformation and updating the text view with the new text and selected region:
+
+```objc
+- (IBAction)toggleBoldface:(id)sender
+{
+    SEMarkdownTextChunks *chunks = [self.textView SE_textChunksFromSelection];
+    [chunks toggleBoldface];
+    [self.textView SE_updateWithTextChunks:chunks];
+}
+```
+
+```swift
+@IBAction func toggleBoldface(sender:AnyObject) {
+	let chunks = textView.SE_textChunksFromSelection()
+	chunks.toggleBoldface()
+	textView.SE_updateWithTextChunks(chunks)
+}
+```
+
+Demo
+----
+
+The project contains an iOS demo with a simple toolbar demonstrating how to wire features to a toolbar.  Open the project in Xcode 6 or later and run the **iOS Demo** target.