Update eggs dependencies
Merge pull request #1119 from camptocamp/update-dependencies

Update eggs dependencies
Update database diagram
Update the SQL Alchemy model
Add new model in forms
Add Alembic migration script
fix update the model
fix update the model
Remove sqlalchemy_migrate migration configuration
fix model modifications
Fix and update alembic conf ans scriptes
Update the documentation and the changelog for Alembic
Remove manage_db and use alembic in the c2ctool
fix model changes
fix alembic
Remove no more needed create_db script
fix alembic