update intro.js (0.3.0 -> 0.4.0)
add html for tutorial mode
add data-intros for tutorial mode
help button css
remove old tutorial mode code
css for tutorial mode
tutorial mode is now a module
fixes #49 Redo tutorial mode
added database class
Added mongodb implementation
Added redis implementation
Update of redis and mongo connectors to singleton classes.
Fix some bugs on the connectors.
Starting of RestApi removal
Replacement of REST API done from quickLogin to the room
Merge pull request #54 from azziel149/tuto

Redo tutorial mode
beginning of fixing problem with websocket server but not resolved
[database] do not generate ids inside main voicious code (but inside db drivers if we have to)
[database] update mongo driver
[database] update redis server
[database] fix error in ws server (access to id instead of _id)
[database] remove deprecated code (REST API) and useless requires
[database] update dependencies in package.json