data module migrated to mongokit

the "type" objects will be stored in a dedicated module.
data objects: work in progress on superclasses

Since the AbstractData instances inherit from SchemaDocument,
there is currently an issue to generate the most appropriate class
from an embedded dictionary in MongoKit.
added ProjectData class to store data belonging to a project.
test_data new version, work in progress...
ProjectData unit testing, work in progress...
add new fields to objects to be used by datamanager
Add temporary token management