[gnome-builder] doc: cross-reference installation docs from contributing for jhbuild

[Christian Hergert <chergert src gnome org>]

commit 25dc30a9878af0bc1f3f9f5a37ed1dc00fcb6a84
Author: Christian Hergert <chergert redhat com>
Date:   Wed Mar 1 16:44:59 2017 -0800

    doc: cross-reference installation docs from contributing for jhbuild
    
    We don't want jhbuild stuff duplicated, so just point them at the
    installation documentation.

 doc/contributing.rst |   25 +++----------------------
 doc/installation.rst |    2 ++
 2 files changed, 5 insertions(+), 22 deletions(-)
---
diff --git a/doc/contributing.rst b/doc/contributing.rst
index d51c794..497aa24 100644
--- a/doc/contributing.rst
+++ b/doc/contributing.rst
@@ -30,28 +30,10 @@ If you wish to start contributing code to Builder, simply pick a bug from this l
 Building From Source
 ====================
 
-One of the first steps to joining a software project is to build the software.
-Check out the `GNOME Newcomers Tutorial`_ for how to build software for GNOME.
-It includes a guide for how to build Builder, as well as many other GNOME software projects.
+Learn out how to install :ref:`via-jhbuild` in our installation documentation.
 
-For the impatient, you can use ``jhbuild`` to simplify the build process.
-
-.. note::
-
-   We do not recommend installing jhbuild using your Linux distributions package manager as
-   it will be out of date.
-
-.. code-block:: sh
-
-
-   git clone git://git.gnome.org/jhbuild.git
-   cd jhbuild
-   ./autogen.sh --simple-install
-   make
-   make install
-   jhbuild sysdeps --install gnome-builder
-   jhbuild build gnome-builder
-   jhbuild run gnome-builder
+Currently, JHBuild is how we recommend contributing to Builder.
+We do expect this to change very soon in that you'll be able to easily contribute to Builder from our 
flatpak-version of Builder.
 
 Improve This Documentation
 ==========================
@@ -75,4 +57,3 @@ Helping us do this in Builder will make you a shepard of geeks.
 .. _`newcomer bugs`: 
https://bugzilla.gnome.org/buglist.cgi?bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&columnlist=component%2Cchangeddate%2Cbug_severity%2Cpriority%2Cshort_desc&keywords=newcomers&list_id=193415&order=changeddate%20DESC%2Ccomponent&product=gnome-builder&resolution=---
 .. _`GNOME Newcomers Tutorial`: https://wiki.gnome.org/Newcomers/BuildGnome
 .. _`git repository`: https://git.gnome.org/browse/gnome-builder/tree
-
diff --git a/doc/installation.rst b/doc/installation.rst
index 494a088..1fc0072 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -49,6 +49,8 @@ You can also use the command line to install Builder.
 .. note:: Nightly builds are built with tracing enabled. The tracing is fairly lightweight, but it includes 
a great deal of more debugging information.
 
 
+.. _via-jhbuild:
+
 via JHBuild
 -----------