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Add link to skills
Add link to missions
Create Missions, Users with devise, Participation to Missions
Add view of missions
Add DatePicker nots working yet
Add options due to Devise
Add skill and company to users
Modification of the template for signin option and redirectec routes for logout in application controller
Modification of the template without simple form
Add skill_id, company_id and attach employee to missions
Add firstname and lastname to user
Add participation models to link employee to missions
Add colum company_id
Modification of the view login
Devise file for initialisation