install local env

http://fizzed.com/oss/rxtx-for-java

1. for linux users need: sudo apt-get install librxtx-java

   we have lib in /usr/lib/jni/

   and add VM option -Djava.library.path="/usr/lib/jni/"

2. for linux system user need access to port: sudo usermod -a -G dialout $USER

   and relogin

3. We may face with some problem, try to run this command sudo apt-get remove modemmanager