Fold gitwash introduction section into section main page.

docs/source/development/gitwash/index.txt

@@ -1,18 +1,30 b''
 .. _using-git:
 
-Working with *ipython* source code
-======================================
+Working with IPython source code
+================================
+
+These pages describe a git_ and github_ workflow for the IPython_ project.
+
+There are several different workflows here, for different ways of
+working with IPython.
+
+This is not a comprehensive git_ reference, it's just a workflow for our
+own project.  It's tailored to the github_ hosting service. You may well
+find better or quicker ways of getting stuff done with git, but these
+should get you started.
+
+For general resources for learning git_ see :ref:`git-resources`.
+
 
 Contents:
 
 .. toctree::
    :maxdepth: 2
-
-   git_intro
+   
    git_install
    following_latest
    patching
    git_development
    git_resources
 
-
+.. include:: git_links.txt