Bump to version 0.4.1
Bump to version 0.4.1

Signed-off-by: Aymeric Brisse <a462d6a602eb500679b027b39ff035d803cbe1e9@perfect-memory.com>
vladzloteanu/mongoid-multitenancy,hiroshi/mongoid-multitenancy,PerfectMemory/mongoid-multitenancy,drobune/mongoid-multitenancy