Update README to display nicely on GitHub.

Author: davidfstr

README.md

@@ -10,25 +10,26 @@ Any app you submit to the Mac App Store must have a GUI. In Python there are a f
 
 * **[Tkinter] / Tk** - Built-in to Python. Just works.
     * Poorly documented. Limited widget set.
-    * <p>Overhead: Nothing</p>
+    * Overhead: Nothing
 * **[PyObjC] / Cocoa**
     * Reasonably documented and maintained. (But requires you to learn Cocoa.)
     * Provides full access to all OS X native widgets.
-    * <p>Overhead: Nothing</p>
+    * Overhead: Nothing
 * **[ctypes] / Cocoa** - Low-level bindings directly to Cocoa frameworks.
     * Most direct way to access native Cocoa frameworks, albeit verbose.
-    * Almost no online documentation for this approach.[^cocoa-python]
-    * <p>Overhead: Nothing</p>
+    * Almost no online documentation for this approach.
+        * The [cocoa-python](https://code.google.com/p/cocoa-python/) library exposes a tiny subset of Cocoa using ctypes. Reading its source code is illustrative.
+    * Overhead: Nothing
 * **[wxPython] / wxWidgets**
     * Well documented. Lots of widgets.
-    * Cannot be submitted to Mac App Store due to wxPython's reliance on deprecated QuickTime APIs.[^wx-qt]
-    * <p>Overhead: 38.7 MB uncompressed, 13.3 MB compressed</p>
+    * Cannot be submitted to Mac App Store due to wxPython's reliance on [deprecated QuickTime APIs](https://groups.google.com/forum/#!topic/wxpython-mac/BeUS9GHigvE).
+    * Overhead: 38.7 MB uncompressed, 13.3 MB compressed
 * **[PySide] / QT**
     * Well documented. Unsure if maintained.
     * The app created by py2app crashes with a segmentation fault. My guess is that the py2app needs a special "recipe" for PySide. I don't feel like writing one myself.
-    * <p>Overhead: 16.6 MB uncompressed, 6.3 MB compressed (estimated)</p>
+    * Overhead: 16.6 MB uncompressed, 6.3 MB compressed (estimated)
 * **[PyQt]4 / QT**
-    * <p>Unable to build from source and no binary installers for OS X are available. Seriously don't people test anything these days?</p>
+    * Unable to build from source and no binary installers for OS X are available. Seriously don't people test anything these days?
 
 The above assessment leaves the following choices for Mac App Store apps:
 
@@ -40,10 +41,6 @@ Probably PyObjC is the best choice to get full functionality. I'm disappointed t
 
 This example app uses PyObjC by default but includes samples for several of the other GUI libraries.
 
-[^cocoa-python]: The [cocoa-python](https://code.google.com/p/cocoa-python/) library exposes a tiny subset of Cocoa using ctypes. Reading its source code is illustrative.
-
-[^wx-qt]: <https://groups.google.com/forum/#!topic/wxpython-mac/BeUS9GHigvE>
-
 [ctypes]: https://docs.python.org/2/library/ctypes.html
 [Tkinter]: https://wiki.python.org/moin/TkInter
 [wxPython]: http://wxpython.org