Add Database Support

[pokoli]

Store some info in the Database (NoSQL prefered):

The objects to store are:

• Player
• ButifarraGame (with all the history of ButiRounds and concequently ButiMoves)
• Chat history (Not Sure).

[pokoli]

The database could be MongoDB because it's dessigned to work with JSON Objects and all the objects that we want to store on the database could be easly represented as JSON Objects.

There is support for node.js, we only need to install de mongodb module.

Check Mongoose to determine if it is usefull for our needs. http://mongoosejs.com/

[pokoli]

Created a new branch for all the work realted to Database:

https://github.com/pokoli/ButiJS/tree/database