-adds attach_treasure job and tests but does not yet add it to the job runner
-only purge a treasure in bury_treasure_addresses if we have attached and verified it
-add methods to treasures.go to get treasures by signed_status or by genesis hash + index. Also adds tests.
-adds attach_treasure job and tests but does not yet add it to the job runner -only purge a treasure in bury_treasure_addresses if we have attached and verified it -add methods to treasures.go to get treasures by signed_status or by genesis hash + index. Also adds tests.