Add accountancy code for trips & fees and renamed libelle field into label
Fix: Can drag from last day of event.
Merge branch 'develop-accounting3' of github.com:aspangaro/dolibarr into
aspangaro-develop-accounting3

Conflicts:
	htdocs/install/mysql/migration/3.6.0-3.7.0.sql
Merge branch 'aspangaro-develop-accounting3' into develop