Fix: make it work with nREPL 0.2.10.

[bizenn]

Tested with:
; CIDER 0.10.0snapshot (package: 20150820.852) (Java 1.8.0_60, Clojure 1.7.0, nREPL 0.2.10)

[nberger]

@bizenn: this is almost a duplicate of #86. To join forces, I think it'd be better if you comment there about the small difference in both solutions.

[bizenn]

nrepl-client.el was refactered and nrepl-send-string-sync was renamed to nrepl-sync-request:eval at 0.8.0.
See: https://github.com/clojure-emacs/cider/blob/master/CHANGELOG.md
#86 looks not work on recent nREPL.

So, I use nrepl-sync-request:eval instead of nrepl-send-string-sync. That's the difference.

[nberger]

Thanks @bizenn. It looks like #84 & #86 should be closed. Let's see what @guns thinks.