Added stream-lib dependency to Maven build

core/pom.xml

@@ -84,6 +84,10 @@
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.clearspring.analytics</groupId>
+      <artifactId>stream</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.twitter</groupId>
       <artifactId>chill_2.9.3</artifactId>

pom.xml

@@ -231,6 +231,11 @@
         <artifactId>asm</artifactId>
         <version>4.0</version>
       </dependency>
+      <dependency>
+        <groupId>com.clearspring.analytics</groupId>
+        <artifactId>stream</artifactId>
+        <version>2.4.0</version>
+      </dependency>
       <dependency>
         <groupId>com.google.protobuf</groupId>
         <artifactId>protobuf-java</artifactId>