update online doc to match the README on github regarding citing and …

…using CLMM (#445)

docs/source/citing.rst

@@ -1,11 +1,10 @@
-*************
-Citing CLMM
-*************
+*********************
+Using and citing CLMM
+*********************
 
-This code, while public on GitHub, has not yet been released by
-DESC and is still under active development.  Our release of v1.0 will
-be accompanied by a journal paper describing the development and
-validation of `CLMM`.
+This code has been released by DESC, although it is still under active
+development.  It is accompanied by a journal paper that describes the
+development and validation of `CLMM`, `arXiv:2107.10857 <https://arxiv.org/abs/2107.10857>`_.
 
 If you make use of the ideas or software here, please cite this
 repository ``https://github.com/LSSTDESC/CLMM``. You are welcome to
@@ -14,7 +13,19 @@ consistent with our `LICENSE
 <https://github.com/LSSTDESC/CLMM/blob/master/LICENSE>`_ (`BSD 3-Clause
 <https://opensource.org/licenses/BSD-3-Clause>`_).
 
-External contributors and DESC members wishing to use CLMM for non-DESC projects
-should consult with the CL working group conveners, ideally before the work has
-started, but definitely before any publication or posting of the work to the arXiv.
+*DESC Projects*: External contributors and DESC members wishing to
+use CLMM for DESC projects should consult with the DESC Clusters analysis
+working group (CL WG) conveners, ideally before the work has started, but
+definitely before any publication or posting of the work to the arXiv.
 
+*Non-DESC Projects by DESC members*: If you are in the DESC
+community, but planning to use CLMM in a non-DESC project, it would be
+good practice to contact the CL WG co-conveners and/or the CLMM Topical
+Team leads as well (see Contact section).  A desired outcome would be for your
+non-DESC project concept and progress to be presented in the working group 
+so working group members can help co-identify tools and/or ongoing development
+that might mutually benefit your non-DESC project and ongoing DESC projects.
+
+*External Projects by Non-DESC members*: If you are not from the DESC 
+community, you are also welcome to contact CLMM Topical Team leads to introduce 
+your project and share feedback.