Nrepl

* Clients can now signal EOF on `*in*` with an empty `:stdin` value (NREPL-65)
* Clojure `:version-string` is now included in response to a `describe`
operation (NREPL-63)
* Improve representation of `java.version` information in response to a
`describe` operation (NREPL-62)

* Fixed the source of a reliable per-connection thread leak (NREPL-40)
* Fix printing of lazy sequences so that `*out*` bindings are properly preserved
(NREPL-45)
* Enhance `clojure.tools.nrepl.middleware.interruptible-eval/evaluate` so that a
custom `eval` function can be provided on a per-message basis (NREPL-50)
* Fix pretty-printing of reference returned by
`clojure.tools.nrepl.server/start-server` (NREPL-51)
* nREPL now works with JDK 1.8 (NREPL-56)
* The value of the `java.version` system property is now included in the response
to a `describe` operation (NREPL-57)
* Common session bindings (e.g. `*e`, `*1`, etc) are now set in time for nREPL
middleware to access them in the case of an exception being thrown (NREPL-58)

* Now using a queue to maintain `*in*`, to avoid intermittent failures due to
prior use of `PipedReader`/`Writer`. (NREPL-39)
* When loading a file, always bind `*print-level*` and `*print-length*` when
generating the `clojure.lang.Compiler/load` expression (NREPL-41)

* Added `clojure.tools.nrepl/code*` for `pr-str`'ing expressions (presumably
for later evaluation)
* session IDs are now properly combined into a set by
`clojure.tools.nrepl/combine-responses`
* fixes printing of server instances under Clojure 1.3.0+ (nREPL-37)

* fixes incorrect translation between `Writer.write()` and
`StringBuilder.append()` APIs (NREPL-38)

Top-to-bottom redesign