Bump version number and update changelog

Update the release notes & changelog page, and bump version numbers.

Change-Id: Ie90f46a8dbd9742fe34fe4bda7180b03731c3e8a
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
diff --git a/deployments/libts/version.txt b/deployments/libts/version.txt
index afaf360..359a5b9 100644
--- a/deployments/libts/version.txt
+++ b/deployments/libts/version.txt
@@ -1 +1 @@
-1.0.0
\ No newline at end of file
+2.0.0
\ No newline at end of file