[readme] Simplification

README.rst

@@ -25,35 +25,6 @@ the original image.
 Usage
 -----
 
-To start annotating, just pass a single image to the ``./bin/annotate.py``
-program. A window will open and allow you to annotate a variable number of
-points in it. The output of the annotation will be placed on the current
-directory, with the same filename as the original input file::
+Start with::
 
-  $ bin/annotate.py example/image.jpg
-
-After a successful annotation session, the file ``image.txt`` should be
-available with all the points you have touched during the annotation process.
-
-
-
-Available keyboard shortcuts
-----------------------------
-
-During the annotation process, on the image window, you can use the following
-keyboard shortcuts to optimise your work.
-
-  * ``?``: this help message
-  * ``x``: places keypoint under mouse cursor
-  * ``d``: deletes the last annotation
-  * ``s``: saves current annotations
-  * ``q``: quits the application, saving annotations
-  * ``D``: deletes annotations for the current image
-  * ``<Esc>`` Quits the application, does not save anything
-
-
-Mouse
------
-
-You can use the mouse to either drag-and-drop keypoints or move the closest
-keypoint to the clicked location.
+  $ ./bin/annotate.py --help