Adding the list of stages to build in the tutorial.

Author: jonathanrocher

README.md

@@ -60,6 +60,27 @@ During the tutorial, don't hesitate to ask for help:
   can be posted.
 
 
+## Outline of the tutorial
+The tutorial will take you through stages to go a from a script (stage 0) to 
+the packaged application. Exercises will get you to build the most significant 
+portions of the differences between each stages but each of them is provided as 
+a separate folder are provided to make sure everyone to get to the end point:
+
+  - step 0: python script
+  - step 1: traits-ified script
+  - step 2: etstool, unit test and CI [OPTIONAL]
+  - step 3: traitsUI view for an image file
+      - File
+      - Enum
+      - Range
+      - readonly output
+      - Float
+  - step 4: pyface application: tree navigator and double click on an image to display the traitsUI view of the image.
+  - step 5: pyface application: add folder editor to displaying a table of metadata for all images inside. Add button to launch the face detection on all images. Add widgets to filter images. 
+  - step 6: pyface application (adaptation to build central pane editors) [OPTIONAL]
+  - step 7: pyface application: background run with traits-futures [OPTIONAL]
+  - step 8: 1-click installer
+
 
 ## Contributing
 ### Code structure