Added README

README.md

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+Android Gesture Detectors Framework
+===================================
+
+Introduction
+------------
+
+Since I was amazed Android has a ScaleGestureDetector since API level 8 but 
+(still) no such thing as a RotateGestureDetector I decided to create this class 
+myself. In the process I decided to create a small extendable framework for
+GestureDetectors in general.
+
+Tutorials
+---------
+
+### Using gesture detectors 
+
+If you want to use the ScaleGestureDetector and/or the gesture detectors 
+from this project, please read my tutorial: [code.almeros.com/android-multitouch-gesture-detectors](http://code.almeros.com/android-multitouch-gesture-detectors)
+
+### Extending
+
+If you want to extend this framework with new gesture detectors please read
+my tutorial about that here: *coming soon*
+
+I hope you'll send me a pull request with your FingerTwistGestureDetector or something ;)
+
+Containments
+------------
+
+### RotateGestureDetector
+
+Helps finding out the rotation angle between the line of two fingers (with the 
+normal or previous finger positions)
+
+### MoveGestureDetector
+
+Convenience gesture detector to keep it easy moving an object around with one 
+ore more fingers without losing the clean usage of the gesture detector pattern.
+
+### ScaleGestureDetector (default Android)
+
+This one is NOT in this framework, but is gesture detector that resides in the 
+Android API since API level 8 (2.2).
+
+### BaseGestureDetector (abstract)
+
+Abstract class that every new gesture detector class should extend.
+
+### TwoFingerGestureDetector (abstract)
+
+Abstract class that extends the BaseGestureDetector and that every new gesture 
+detector class for two finger operations should extend.