We have to check that user exists before setting or getting preferences

Fix issue on signature if saved position "Rectangle" class is rounded to int. Switch to Rectangle2D.Float to save stamp position to float

Create cache for metadatas

See merge request libriciel/pole-signature/i-Parapheur-4/iparapheur-core!1

Upgrade crypto to 3.0.2, create Bean for v3 but still use v1 api for pesv2 as there is breaking change in API.
Upgrade can be "rollback" for crypto v2 by uncommenting bean definitions in applicationContext.xml lines 17 to 20 and commenting lines 25 to 29