Branch from 0.9.5 release.

Implement new Main wrapper class for utility.jar, to
work around izpack ticket #162 http://jira.codehaus.org/browse/IZPACK-162
which prevents us from specifying a main class as it fails on
Windows installations when a full path including a drive letter is specified
(ticket #912)

installer/java/build.xml

@@ -49,6 +49,7 @@
             <fileset dir="../../core/java/build/obj" includes="**/FileUtil.class"/>
             <fileset dir="./build/obj" includes="**" />
             <manifest>
+                <attribute name="Main-Class" value="net.i2p.installer.Main" />
                 <attribute name="Built-By" value="${build.built-by}" />
                 <attribute name="Build-Date" value="${build.timestamp}" />
                 <attribute name="Base-Revision" value="${workspace.version}" />