Tweak log message. Update changelog + version

Author: Dan Richelson

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 
 All notable changes to the LaunchDarkly Java SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
+## [2.1.0] - 2017-03-02
+### Added
+- LdClientInterface (and its implementation) have a new method: `boolean isFlagKnown(String featureKey)` which checks for a 
+feature flag's existence. Thanks @yuv422!
+
 ## [2.0.11] - 2017-02-24
 ### Changed
 - EventProcessor now respects the connect and socket timeouts configured with LDConfig.

build.gradle

@@ -19,7 +19,7 @@ repositories {
 
 allprojects {
     group = 'com.launchdarkly'
-    version = "2.0.11"
+    version = "2.1.0"
     sourceCompatibility = 1.7
     targetCompatibility = 1.7
 }

src/main/java/com/launchdarkly/client/LDClient.java

@@ -311,7 +311,7 @@ public JsonElement jsonVariation(String featureKey, LDUser user, JsonElement def
   @Override
   public boolean isFlagKnown(String featureKey) {
     if (!initialized()) {
-      logger.warn("Evaluation called before Client has been initialized for feature flag " + featureKey + "; returning unknown");
+      logger.warn("isFlagKnown called before Client has been initialized for feature flag " + featureKey + "; returning false");
       return false;
     }