Sandia OpenSHMEM v1.3.0

• Support for OpenSHMEM 1.3 specification, including nonblocking communication, fetch/set atomics, all-to-all collectives, C11 generic bindings, and addition of const/volatile to C API.
• Improvements to error checking of OpenSHMEM calls and internal debugging enabled through --enable-error-checking configure option.
• Improvements to C++ compatibility, including support for type-generic bindings in C++.
• Support for fabric and domain selection in the OFI transport, see SMA_OFI_DOMAIN/FABRIC environment variables in the README file for details.
• Support for systems using the Aries network via the OFI GNI provider.
• Enabled XPMEM support in combination with the OFI transport.
• Support for PMI2-compliant process managers.
• The OFI transport automatically falls back to software reductions when the provider does not support the particular combination of atomic operation and datatype for a given OpenSHMEM reduction.
• Added multiple communication performance benchmarks to the test suite.
• Multiple bug fixes and improvements to stability and performance.