Updated timeline

+ A template for the timeline text
+ Helpers for handlebars
+ Used these new features for the timeline
Add an entry for person in the client API

+ Add an entry for person in the client API
+ Fixed 2 errors in the model
+ Updated the get function in order to accept an optionnal parameter
"data"
Did the server part which handles persons
Fixed imports
Made the link between the server and the client for persons

+ Add a script to fill the database with fakes persons
+ Fixed a typo in the controller persons
+ Replace person's model methods by statics methods
+ Add a way to make synchronous call to the API
+ And many littles fixes...
Introduced a tooltip
Merged timeline and master
Fixed some client's API call
Branches master and timeline now successfully merged