New keys for PrismaTreeBuilder
For the LNL campaign, the ancillaries will come in an event type frame. For the moment, I have decided to create a new type of event frame named event:ranc that can contain any data:rancN frames I had for this to add new keys and maks for event:ranc and data:ranc in order to be able to trig on a event:ranc composite frame. Olivier, can you check in the PRISMATreeBuilder branch that what I have done is well in coherence with the adf keys standards.