changelog update

Signed-off-by: eantwuh <antal.wu-hen-chang@ericsson.com>
diff --git a/doc/CoAP_CNL113829_1551.pdf b/doc/CoAP_CNL113829_1551.pdf
deleted file mode 100644
index 33ac79d..0000000
--- a/doc/CoAP_CNL113829_1551.pdf
+++ /dev/null
Binary files differ
diff --git a/doc/CoAP_CNL113829_PRI.doc b/doc/CoAP_CNL113829_PRI.doc
deleted file mode 100644
index ed3cf41..0000000
--- a/doc/CoAP_CNL113829_PRI.doc
+++ /dev/null
Binary files differ
diff --git a/doc/change.log b/doc/change.log
index e69de29..5b01f0d 100644
--- a/doc/change.log
+++ b/doc/change.log
@@ -0,0 +1,16 @@
+= NAS EPS v16.0.0 Protocol Modules for TTCN-3 Toolset with TITAN, Change log
+:author: Antal Wu-Hen-Chang
+:toc: left
+
+== Changes
+
+=== R1A
+
+Initial revision
+
+=== R1B
+
+Blockwise options added
+Negative testing added
+Added Java implementation of CoAP encode/decode
+Corrected payload decoding