POM modification

Signed-off-by: mgolab <mgolab91@o2.pl>
Small changes

Signed-off-by: mgolab <mgolab91@o2.pl>
Now Maven creates a jar with dependencies (the jar file contains jxl.jar so works correctly without moving the jxl.jar to target folder)

Signed-off-by: mgolab <mgolab91@o2.pl>