Issue/433/credits readme (#435)

* Added license, credits, feedback; acknowledgments; contact to readme

* minor typos in readme

* minor typos in readme

* Modified line on contacting WG conveners according to PR comment from Celine

* added text for non desc projects from desc members

* Update README.md

Text added in # License, Credits, Feedback etc section.

Co-authored-by: Marina Ricci <[email protected]>

README.md

@@ -71,3 +71,95 @@ Contributing documentation can be found [here](CONTRIBUTING.md)
 
 ## Contact <a name="contact"></a>
 If you have comments, questions, or feedback, please [write us an issue](https://github.com/LSSTDESC/CLMM/issues).
+
+
+# License, Credits, Feedback etc
+
+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`, which you can find on the
+arxiv:[2107.10857](https://arxiv.org/abs/2107.10857).  If you make use
+of the ideas or software here, please cite that paper and provide a
+link to this repository: https://github.com/LSSTDESC/CLMM. You are
+welcome to re-use the code, which is open source and available under
+terms consistent with our
+[LICENSE](https://github.com/LSSTDESC/CLMM/blob/main/LICENSE) ([BSD
+3-Clause](https://opensource.org/licenses/BSD-3-Clause)).
+
+**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.
+
+
+For free use of the `NumCosmo` library, the `NumCosmo` developers
+require that the `NumCosmo` publication be cited: NumCosmo: Numerical
+Cosmology, S. Dias Pinto Vitenti and M. Penna-Lima, Astrophysics
+Source Code Library, record ascl:1408.013.  See citation info
+[here](https://ui.adsabs.harvard.edu/abs/2014ascl.soft08013D/exportcitation).
+The `NumCosmo` repository can be found [here](https://github.com/NumCosmo/NumCosmo).
+
+For free use of the `CCL` library, the `CCL` developers require that
+the `CCL` publication be cited.  See details
+[here](https://github.com/LSSTDESC/CCL)
+
+The `Cluster Toolkit` documentation can be found
+[here](https://cluster-toolkit.readthedocs.io/en/latest/#)
+
+# Contact
+
+If you have comments, questions, or feedback, please [write us an
+issue](https://github.com/LSSTDESC/CLMM/issues).
+
+The current leads of the LSST DESC CLMM Topical Team are Celine Combet
+(combet, [email protected]) and Alex Malz (aimalz,
+[email protected])
+
+
+# Acknowledgements
+
+The DESC acknowledges ongoing support from the Institut National de
+Physique Nucl\'eaire et de Physique des Particules in France; the
+Science \& Technology Facilities Council in the United Kingdom; and
+the Department of Energy, the National Science Foundation, and the
+LSST Corporation in the United States.  DESC uses resources of the
+IN2P3 Computing Center (CC-IN2P3--Lyon/Villeurbanne - France) funded
+by the Centre National de la Recherche Scientifique; the National
+Energy Research Scientific Computing Center, a DOE Office of Science
+User Facility supported by the Office of Science of the U.S.
+Department of Energy under Contract No. DE-AC02-05CH11231; STFC DiRAC
+HPC Facilities, funded by UK BIS National E-infrastructure capital
+grants; and the UK particle physics grid, supported by the GridPP
+Collaboration.  This work was performed in part under DOE Contract
+DE-AC02-76SF00515.
+
+The authors express gratitude to the LSSTC for the 2018 and 2019
+Enabling Science grants, hosted by CMU and RUB respectively, that
+supported the development of `CLMM` and its developer community.  CA
+acknowledges support from the LSA Collegiate Fellowship at the
+University of Michigan, the Leinweber Foundation, and DoE Award
+DE-FOA-0001781.  AIM acknowledges support from the Max Planck Society
+and the Alexander von Humboldt Foundation in the framework of the Max
+Planck-Humboldt Research Award endowed by the Federal Ministry of
+Education and Research. During the completion of this work, AIM was
+advised by David W. Hogg and supported by National Science Foundation
+grant AST-1517237.  CS acknowledges support from the Agencia Nacional
+de Investigaci\'on y Desarrollo (ANID) through FONDECYT grant no.
+11191125.  AvdL, RH, LB, and HF acknowledge support by the US
+Department of Energy under award DE-SC0018053.  SF acknowledges
+support from DOE grant DE-SC0010010.  HM is supported by the Jet
+Propulsion Laboratory, California Institute of Technology, under a
+contract with the National Aeronautics and Space Administration.
+