Add quotes around $JAVA

Allows script to run when JAVA_HOME has spaces in it (for instance "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home" which is common on OSX). Without this change, the error reported by the script is "./scripts/RapidMinerGUI: line 170: /Library/Internet: No such file or directory"

scripts/RapidMinerGUI

@@ -167,7 +167,7 @@ do
 	if [ $NUMBER_OF_CORES -gt 1 ]
 	then
 		echo Starting in multi-core mode
-		$JAVA $ADDITIONAL_OPTIONS \
+		"$JAVA" $ADDITIONAL_OPTIONS \
 	    -Xmx${MAX_JAVA_MEMORY}m \
 	    -XX:MaxPermSize=128m \
 		-cp ${CLASSPATH} \
@@ -177,7 +177,7 @@ do
 		com.rapid_i.Launcher "$@"
 	else
 		echo Starting in single-core mode
-		$JAVA \
+		"$JAVA" \
 	    -Xmx${MAX_JAVA_MEMORY}m \
 	    -XX:MaxPermSize=128m\
 		-cp ${CLASSPATH} \