Fixes #21 Renames jar file distribution from loklak.jar to susiserver…

….jar

Enables execution with `java -jar dist/susiserver.jar` on all platforms.

build.xml

@@ -128,10 +128,10 @@
 
     <target name="jar" depends="build">
         <mkdir dir="dist"/>
-	    <manifestclasspath property="jar.classpath" jarfile="dist/loklak.jar">
+	    <manifestclasspath property="jar.classpath" jarfile="dist/susiserver.jar">
 		    <classpath refid="loklak.classpath" />
 	    </manifestclasspath>
-	    <jar destfile="dist/loklak.jar" basedir="classes/">
+	    <jar destfile="dist/susiserver.jar" basedir="classes/">
 		    <manifest>
 			    <attribute name="Class-Path" value="${jar.classpath}" />
 			    <attribute name="Main-Class" value="org.loklak.SusiServer" />