Adding changelist file

Author: marsaev

CHANGELIST

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+CHANGELIST
+
+===============================================================
+
+v2.2.0
+
+---------------------------------------------------------------
+
+- Fixing GPU Direct support (now correct results and better perf)
+- Fixing latency hiding (general perf and couple bugfixes in some specific cases)
+- Tunings for Volta for agg and classical setup phase
+- Gauss-siedel perf improvements on Volta+
+- Ampere support
+- Minor bugfixes and enhancements including reported/requested by community
+
+Tested configurations:
+- Linux x86-64:
+-- Ubuntu 20.04, Ubuntu 18.04
+-- gcc 7.4.0, gcc 9.3.0
+-- OpenMPI 4.0.x
+-- CUDA 10.2, 11.0, 11.2
+- Windows 10 x86-64:
+-- MS Visual Studio 2019 (msvc 19.28)
+-- MS MPI v10.1.2
+-- CUDA 10.2, 11.0
+
+
+===============================================================
+
+v2.1.0
+
+---------------------------------------------------------------
+
+- Added new API that allows user to provide distributed matrix partitioning information in a new way - offset to the partition's first row in a matrix. Works only if partitions own continuous rows in matrix. 
+- Added example case for this new API (see examples/amgx_mpi_capi_cla.c)
+- Distributed code improvements
+
+===============================================================
+
+v2.0.0
+
+---------------------------------------------------------------
+
+Initial open source release