Add database functions and bytes value types to Datomic

gistfile1.clj

;; Builds of Datomic with revision numbers higher than 0.1.3057 have
;; support for :db.type/fn, :db.type/bytes, and :db/fn.

;; To add these types to a database created using with a pre-0.1.3057
;; build, simply run the database with a newer version of Datomic, and
;; execute the two transactions below.

[{:db/id #db/id [:db.part/db]
  :db/ident :db.type/bytes
  :fressian/tag :bytes
  :db/doc "Value type for small binaries. Maps to byte array on the JVM."
  :db.install/_valueType :db.part/db}
 {:db/id #db/id [:db.part/db]
  :db/ident :db.type/fn
  :fressian/tag :datomic/fn
  :db/doc "Value type for database functions. See Javadoc for Peer.function."
  :db.install/_valueType :db.part/db}]
[{:db/id #db/id [:db.part/db]
  :db/ident :db/fn
  :db/valueType :db.type/fn
  :db/cardinality :db.cardinality/one
  :db/doc "A function-valued attribute for direct use by transactions and queries."
  :db.install/_attribute :db.part/db}]