graphics: move "MakeTiles" program into src/ directory

(but do not include it in the generated jar file)

git-svn-id: https://micropolis.googlecode.com/svn/trunk/micropolis-java@714 d9718cc8-9f43-0410-858b-315f434eb58c

build.xml

@@ -62,7 +62,7 @@
 <map from="${basedir}" to="." />
 </pathconvert>
 
-<jar destfile="${distfile}" basedir="${builddir}">
+<jar destfile="${distfile}" basedir="${builddir}" excludes="/micropolisj/build_tool/**">
 	<manifest>
 		<attribute name="Main-Class" value="micropolisj.Main" />
 		<attribute name="Class-Path" value="${runtime-classpath}" />

src/micropolisj/build_tool/MakeTiles.java

@@ -1,3 +1,5 @@
+package micropolisj.build_tool;
+
 import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.*;