Doc: Updated for Version 1.0-RC1

This patch updates the documentation landing
page (readme.rst) to reflect the latest
release (Version 1.0-RC1).

* Updated Sphynx documentation version tags
* Updated Doxygen documentation version tags
* Updated features/capabilities described in readme.rst

Change-Id: I273127e18b21e1c71feb140215f80a9826c0e0df
Signed-off-by: Galanakis, Minos <minos.galanakis@arm.com>
diff --git a/cmake/Common/BuildDoxygenDoc.cmake b/cmake/Common/BuildDoxygenDoc.cmake
index a56898b..272948f 100644
--- a/cmake/Common/BuildDoxygenDoc.cmake
+++ b/cmake/Common/BuildDoxygenDoc.cmake
@@ -85,7 +85,7 @@
 	#Version ID of TF-M.
 	#TODO: this shall not be hard-coded here. A process need to defined for
 	#      versioning the document (and TF-M).
-	set(DOXYCFG_TFM_VERSION "v1.0.0-Beta")
+	set(DOXYCFG_TFM_VERSION "v1.0-RC1")
 
 	#Using add_custom_command allows CMake to generate proper clean commands
 	#for document generation.