Fixes #34: update README and build.sbt for v1.2.1.

Author: jasonbaldridge

README.md

@@ -10,7 +10,7 @@ Nak currently provides implementations for k-means clustering and supervised lea
 
 See [the Nak wiki](https://github.com/scalanlp/nak/wiki) for (some preliminary and unfortunately sparse) documentation.
 
-The latest stable release of Nak is 1.2.0. Changes from the previous release include:
+The latest stable release of Nak is 1.2.1. Changes from the previous release include:
 
 * breeze-learn pulled into Nak
 * K-means from breeze-learn and Nak merged.
@@ -22,14 +22,14 @@ See the [CHANGELOG](https://github.com/scalanlp/nak/wiki/CHANGELOG) for changes
 
 In SBT:
 
-    libraryDependencies += "org.scalanlp" % "nak" % "1.2.0"
+    libraryDependencies += "org.scalanlp" % "nak" % "1.2.1"
 
 In Maven:
 
     <dependency>
        <groupId>org.scalanlp</groupId>
        <artifactId>nak</artifactId>
-       <version>1.2.0</version>
+       <version>1.2.1</version>
     </dependency>
 
 

build.sbt

@@ -1,6 +1,6 @@
 name := "nak"
 
-version := "1.2.1-SNAPSHOT"
+version := "1.2.1"
 
 organization := "org.scalanlp"