IMPORTANT FIX: small strings weren't getting a proper UTF-8 encoding (xkihzew)

`(.getBytes <string>)` was being used here instead of
`(.getBytes <string> "UTF-8")` as is correct and done elsewhere.

This means that small UTF-8 strings may have been incorrectly stored
in environments where UTF-8 is not the default JVM character encoding.

Bug was introduced in Nippy v2.6.0, released 9 days ago (2014 Mar 30).

*********************************************************************
Please check for possible errors in Unicode text written using Nippy
v2.6.0 if your JVM uses an alternative character encoding by default
*********************************************************************

Really sorry about this, not sure how this slipped in.

Thanks to @xkihzew for the bug report.

CHANGELOG.md

@@ -1,3 +1,9 @@
+## v2.6.1 / 2014 Apr 8
+
+> **CRITICAL FIX** for v2.6.0 released 9 days ago. Please upgrade ASAP!
+
+
+
 ## v2.6.0 / 2014 Mar 30
 
 > **Major release** with efficiency improvements, reliability improvements, and some new utils.

src/taoensso/nippy.clj

@@ -186,7 +186,7 @@
 (extend-type String ; Optimized common-case type
   Freezable
   (freeze-to-out* [x ^DataOutput out]
-    (let [ba (.getBytes x)]
+    (let [ba (.getBytes x "UTF-8")]
       (if (<= (alength ^bytes ba) Byte/MAX_VALUE)
         (do (write-id    out id-string-small)
             (write-bytes out ba :small))