Add script to convert PPT to PNGs

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1773618 13f79535-47bb-0310-9956-ffa450edef68

ppt2png.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# find jar-file with highest version number
+for i in `ls build/dist/poi-*.jar | grep -v -- "-sources" | grep -v -- "-excelant" | grep -v -- "-ooxml"`;do
+	CP=$CP:$i
+done
+echo Using classpath $CP
+
+java -cp $CP org.apache.poi.hslf.examples.PPT2PNG "$@"