0.11.4

Experimental support for Clojure on JVM:

• sorted-set instead of BTSet
• polymorphic get lookup in query
• no sorting optimisation for init-db
  Performance numbers so far (raw data):
  • queries with single clause, no join: 30–50% faster
  • queries with joins: ~50% slower
  • transact: ~3.5–4 times faster
  • init-db: ~2–2.5 times slower
  • rules: ~2–5 times faster
  • db equiv: ~5 times slower
  • db hash: ~10 times slower