Move catalog/resource hash computation functions out of
scf/storage.clj and into scf/hash.clj
Moved storage utility functions out of storage.clj to prevent a cyclic
dependency between storage.clj and query.clj
Changed the storage-utils require alias from sutil -> sutils
Merge pull request #743 from senior/maint/master/scf-storage-split

Move storage utility and hashing functions out of scf/storage.clj and into their on namespaces