Consolidated "Platforms Supported" and "More Platforms Tested"

[lrknox]

sections of RELEASE.txt into "Platforms Tested".

[lrknox]

I removed the Solaris and Windows 10 (32 bit) lines from the "Tested Configuration Features Summary" table. There may be further additions or consolidations to that table.

[derobins]

I feel like it would be useful to have a paragraph that describes what should work and what we know doesn't work. For example, we know that certain versions of Windows won't work due to missing C99 support. I'm not sure if that sort of thing belongs here or elsewhere, though.

[byrnHDF]

I feel like it would be useful to have a paragraph that describes what should work and what we know doesn't work. For example, we know that certain versions of Windows won't work due to missing C99 support. I'm not sure if that sort of thing belongs here or elsewhere, though.

But our minimum is VS2015 and I think that is fine?

[byrnHDF]

BB defaults and StdShar config:
CMake
BUILD_SHARED_LIBS: BOOL: ON HDF5_BUILD_JAVA: BOOL: ON HDF5_BUILD_FORTRAN: BOOL: ON HDF5_BUILD_CPP_LIB: BOOL: ON HDF5_BUILD_DOC: BOOL: ON
autotools
fortran: enable cxx: enable java: enable doxygen: enable

[byrnHDF]

BB configs
StdStat:
CMake BUILD_SHARED_LIBS: BOOL: OFF HDF5_BUILD_JAVA: BOOL: OFF
autotools: static: enable shared: disable java: disable

[byrnHDF]

Other significant configs:
TSShar (StdShar with threadsafe)
CMake: HDF5_ENABLE_THREADSAFE: BOOL: ON ALLOW_UNSUPPORTED: BOOL: ON
autotools: threadsafe: enable unsupported: enable

StdMPIShar (StdShar with MPI)
CMake: HDF5_ENABLE_PARALLEL: BOOL: ON HDF5_BUILD_CPP_LIB: BOOL: OFF HDF5_BUILD_JAVA: BOOL: OFF
autotools: parallel: enable cxx: disable java: disable
StdClang (CMake sanitizers)
Address: ONLY_SHARED_LIBS: BOOL: ON HDF5_BUILD_JAVA: BOOL: OFF HDF5_BUILD_FORTRAN: BOOL: OFF HDF5_ENABLE_SANITIZERS: BOOL: ON USE_SANITIZER: STRING: Address CMAKE_TOOLCHAIN_FILE: STRING: 'config/toolchain/clang.cmake'
Leak: ONLY_SHARED_LIBS: BOOL: ON HDF5_BUILD_JAVA: BOOL: OFF HDF5_BUILD_FORTRAN: BOOL: OFF HDF5_ENABLE_SANITIZERS: BOOL: ON USE_SANITIZER: STRING: Leak CMAKE_TOOLCHAIN_FILE: STRING: 'config/toolchain/clang.cmake'
Memory: ONLY_SHARED_LIBS: BOOL: ON HDF5_BUILD_JAVA: BOOL: OFF HDF5_BUILD_FORTRAN: BOOL: OFF HDF5_ENABLE_SANITIZERS: BOOL: ON USE_SANITIZER: STRING: Memory CMAKE_TOOLCHAIN_FILE: STRING: 'config/toolchain/clang.cmake'
Undefined: ONLY_SHARED_LIBS: BOOL: ON HDF5_BUILD_JAVA: BOOL: OFF HDF5_BUILD_FORTRAN: BOOL: OFF HDF5_ENABLE_SANITIZERS: BOOL: ON USE_SANITIZER: STRING: Undefined CMAKE_TOOLCHAIN_FILE: STRING: 'config/toolchain/clang.cmake'