fix digidotcom#53: check that 64-bit address is not unknown before ob…

…taining the

remote XBee device from the network

digidotcom#53

Signed-off-by: Ruben Moral <[email protected]>

XBee Java Library v1.1.1

XBee Java Library v1.1.0

XBee Java Library version 1.0.1

Updating the release notes.

Signed-off-by: Tatiana Leon <[email protected]>