changed load_data signature to accept named parameters
ini backend: pass split_reg reg exp to load_data
test ini backend: test split_reg parameter

Just like in multistrap model
removed dead auto_read attribute
use Moose attibute
Value: added some async_logger traces
VAlue: changed attribute name for backward compat
Value: changed the way fixed are done
Value: make sure that all fixes are applied

even if a fixed value can trigger a new fix to be applied
Layered value: change to async store