Update ReleaseNotes
ALLJOYN-2503 Add send timeout functionality.

Change-Id: Ibb776b57bbfaaf5f18ea7444e03eb9143865fb58
ALLJOYN-2442: Remove problematic call to GetPeerGUID in test
applications.

The call to GetPeerGUID can cause a deadlock when built against
OpenSSL without multi-threading support.

Change-Id: I9c148f8fdd90718a5d42e315393cf6757ca73f7d
Update ReleaseNotes

Change-Id: Ib4e74d4004ce0a819b7047a522dbfa41c9901f81