Added Chat support & also displaying the time remaining for each user

[kiran9k]

Hi ,

In the previous request , the time played by each user was being displayed .But however , I felt that it is important to display the time remaining than the time taken . This pull request is for that purpose . (Also , an option is provided , thru which one can add 10 sec to each valid move by a player .)

Also , a small chat session has been integrated . Whenever anyone messages in the chat , all players are notified & the chat box opens itself . Its just a basic chat done using Socket io . Feel free to change the design or any other components .

Regards,
Kiran

[fmbenhassine]

Great! Another cool addition, many thanks Kiran 👍

I'll merge it asap.

For next time, try to send a pull request per feature. This would be easier to follow changes and to keep project's history clean.