Bump version number and update changelog

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

Signed-off-by: Gyorgy Szing <gyorgy.szing@arm.com>
Change-Id: I9629b16c760f439c36c3be176cd7a064eab17956
diff --git a/version.txt b/version.txt
index afaf360..1cc5f65 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.0
\ No newline at end of file
+1.1.0
\ No newline at end of file