[RXTX] Updated to RXTX 2.2 library.

Used RXTX 2.2 library, it seems to work better than 2.1.7.

Signed-off-by: Tatiana Leon <tatiana.leon@digi.com>
Do not include the jar files for the source code in the distribution
deliverable.

Signed-off-by: Tatiana Leon <tatiana.leon@digi.com>
Updated version to 1.0.1.

Signed-off-by: Tatiana Leon <tatiana.leon@digi.com>