Update CHANGES and README

CHANGES

@@ -3,6 +3,9 @@
 
 Following is a brief summary of changes made in each release of LibintX.
 
+- 19-July-2023: 0.2.0
+  - High Angular Momentum 4-center McMurchie-Davidson, cf. High-performance evaluation of high angular momentum 4-center Gaussian integrals on modern accelerated processors
+
 - 19-May-2023: 0.1.0
   - Distributed DF-based J engine
   - Obara-Saika-based evaluation of 3-center Coulomb integrals

README.md

@@ -2,6 +2,8 @@
 
 LibintX is a library for accelerated evaluation of molecular integrals of many-body operators over Gaussian atomic orbitals. The primary purpose of LibintX is to enable efficient evaluation of 2-body operators in Gaussian AO integrals on accelerated architectures like the CUDA-capable graphical processing units (GPU). However, it can also be used on conventional/central processing units (CPUs).
 
+Until version 1.0 this will remain EXPERIMENTAL code development; expect things to break and APIs to change.  https://github.com/ValeevGroup/libintx/ is the public mirror of the private development repo.  Don't make PRs against the public mirror; if you wish to collaborate send us a request.
+
 # Installation
 
 ## Prerequisites
@@ -23,7 +25,7 @@ LibintX is developed by the [Valeev Group](http://valeevgroup.github.io/) at [Vi
 
 # License
 
-LibintX is freely available under the terms of the LGPL v3+ licence. See the included LICENSE file for details. If you are interested in using TiledArray under different licensing terms, please contact us.
+LibintX is freely available under the terms of the LGPL v3+ licence. See the included LICENSE file for details. If you are interested in using LibintX under different licensing terms, please contact us.
 
 # How to Cite