Whatsapp released new version of it – v2.12.250-to Android users. It comes with many messaging options as well as less data usage. It also includes many new emojis.
In the new update even after you read the message you can mark it as unread. It is useful to highlight some messages so that user can come back later to read it.
Also the custom notification facility allows you to set custom settings for individual contacts. You can set a particular notification ringtone for a particular contact.
There will be a new option under chats and call settings which will enable you to reduce the data usage while whatsapp calling. The disappointing factor is that the expected Google Drive integration is excluded and it is now expected to be adding in next update.