RmsGateway Install and Update script

C. Schuman wrote a script to install and update RMS Gateway. It`s very handy now the are very busy with updating the code of RMS Gateway to handle the new demands of Winlink.

You just have to pay attention to these lines of code that you have the right version.

The version rmsgw-2.4.0-181.1.tar.bz2 is of 14-Sep-2018 16:41