add unix launch script

Author: cambecc

src/assembly/assembly.xml

@@ -21,7 +21,8 @@
             <includes>
                 <include>**</include>
             </includes>
-            <fileMode>744</fileMode>
+            <directoryMode>0755</directoryMode>
+            <fileMode>0755</fileMode>
         </fileSet>
     </fileSets>
 

src/bin/grib2json

@@ -0,0 +1,6 @@
+#!/bin/sh
+#set -x
+
+LIB_DIR=$(dirname "$0")/../lib
+LAUNCH_JAR=$LIB_DIR/grib2json-*.jar
+$JAVA_HOME/bin/java -Xmx1G -jar $LAUNCH_JAR $@

src/main/java/net/nullschool/grib2json/Options.java

@@ -14,7 +14,7 @@
 @CommandLineInterface(application="grib2json")
 public interface Options {
 
-    @Option(shortName="h", description="display help")
+    @Option(shortName={"h", "?"}, description="display help")
     boolean isHelp();
 
     @Option(shortName="n", description="print names of codes")