Add authentication arguments to export command

This fixes #17

Author: markphip

cmdline/src/main/java/org/tigris/subversion/svnclientadapter/commandline/SvnCommandLine.java

@@ -354,6 +354,7 @@ void export(String url, String path, String revision, boolean force) throws CmdL
 		args.add(path);
 		if (force)
 			args.add("--force");
+		args.addAuthInfo(this.user, this.pass);
         args.addConfigInfo(this.configDir);			
 		execVoid(args);
 	}