added error and success language files

removed some code from server side that was emitting alerts

src/user.js

@@ -139,7 +139,7 @@ var bcrypt = require('bcryptjs'),
 			}
 
 			if (Date.now() - parseInt(lastposttime, 10) < parseInt(meta.config.postDelay, 10) * 1000) {
-				return callback(new Error('too-many-posts'));
+				return callback(new Error('[[error:too-many-posts, ' + meta.config.postDelay + ']]'));
 			}
 			callback();
 		});