Added swap-red-blue option, excluding META-INF from war (in case generated by an IDE, etc).

guacamole/build.xml

@@ -33,7 +33,9 @@
 		depends="compile">
 		<war destfile="${dist.dir}/guacamole.war"
 			webxml="${build.dir}/WEB-INF/web.xml">
-			<fileset dir="${build.dir}"/>
+            <fileset dir="${build.dir}">
+                <exclude name="META-INF/**"/>
+            </fileset>
 		</war>
 	</target>