MLBEDSW-4095: Update RELEASE notes and other docs

 - Updated release notes
 - Updated supported ops
 - Clarified platform support
 - Minor clean up of README

Signed-off-by: Tim Hall <tim.hall@arm.com>
Change-Id: I62b9ff66fc7729b184a5dbb322406cfcdef4e542
diff --git a/setup.py b/setup.py
index 98dfe52..2c77b70 100644
--- a/setup.py
+++ b/setup.py
@@ -58,7 +58,7 @@
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: POSIX :: Linux",
-        "Operating System :: Microsoft :: Windows",
+        "Operating System :: Microsoft :: Windows :: Windows 10",
         "Programming Language :: C",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.6",