Employee management added

A new integrated module has been added and is freely available on your console to everyone, employee management.

It must be understood that a user inside your console is not automatically an employee, but that an employee profile is a user every time. A user account contains only information to connect to the console and is used on some modules and sections but an employee profile contains more information related to your employees like his birthday, it's hiring date, his salary (optional) and, eventually, his departure date.

Some information saved under the employee profile is used to populate some modules and sections like the internal contact list, anniversaries, seniority. An employee profile is also the basis for some modules and sections for their content.