#20 Inclusion of META-INF/services is missing in build.xml

[Yury Hushchyn]

jar fileset in jar target shall include entry for META-INF/services, otherwise Gsm7Bit encoding does not work.

The fileset shall look like:

        <fileset dir="${build.classes.dir}" >
            <include name="org/smpp/**" />
            <include name="META-INF/services/**" />
        </fileset>