Prep for 1.6 release.

Author: ctmay4

README.md

@@ -29,14 +29,14 @@ Download [the latest JAR][1] or grab via Maven:
 <dependency>
     <groupId>com.imsweb</groupId>
     <artifactId>staging-client-java</artifactId>
-    <version>1.5</version>
+    <version>1.6</version>
 </dependency>
 ```
 
 or via Gradle:
 
 ```groovy
-compile 'com.imsweb.com:staging-client-java:1.5'
+compile 'com.imsweb.com:staging-client-java:1.6'
 ```
 
 ## Usage

build.gradle

@@ -8,7 +8,7 @@ plugins {
 }
 
 group = 'com.imsweb'
-version = '1.6-SNAPSHOT'
+version = '1.6'
 description = 'Java client library for staging calculations'
 
 println "Starting build using ${Jvm.current()}"