update models comments.
update data_files table to add a field to know if a file is 'deleted' (eg available for use) or not.
update annotate.
rake erd...
rake erd generation
Update Readme
file manager list rework
file manager destroy method.
generate an attachment controller.
first version of attachment controller (move the method which was in the file_management controller and which are not file related...
cleanup following commit 8541b51.
add comments to attachment controller.
update views for crud attachment...
Do not track changes in database config.
cleanup useless.
update the model annotations.
add some fields in the attachment table.
update the erd schema.
migration to move files fields from attachment table to datafile table.
run migration