Update README to reference v0.13.2

Author: ejona86

README.md

@@ -27,23 +27,23 @@ Download [the JAR][]. Or for Maven, add to your `pom.xml`:
 <dependency>
   <groupId>io.grpc</groupId>
   <artifactId>grpc-all</artifactId>
-  <version>0.13.1</version>
+  <version>0.13.2</version>
 </dependency>
 ```
 
 Or for Gradle, add to your dependencies:
 ```gradle
-compile 'io.grpc:grpc-all:0.13.1'
+compile 'io.grpc:grpc-all:0.13.2'
 ```
 
 For Android client, you only need to depend on the needed sub-projects, such as:
 ```gradle
-compile 'io.grpc:grpc-okhttp:0.13.1'
-compile 'io.grpc:grpc-protobuf-nano:0.13.1'
-compile 'io.grpc:grpc-stub:0.13.1'
+compile 'io.grpc:grpc-okhttp:0.13.2'
+compile 'io.grpc:grpc-protobuf-nano:0.13.2'
+compile 'io.grpc:grpc-stub:0.13.2'
 ```
 
-[the JAR]: https://search.maven.org/remote_content?g=io.grpc&a=grpc-all&v=0.13.1
+[the JAR]: https://search.maven.org/remote_content?g=io.grpc&a=grpc-all&v=0.13.2
 
 Development snapshots are available in [Sonatypes's snapshot
 repository](https://oss.sonatype.org/content/repositories/snapshots/).
@@ -75,7 +75,7 @@ For protobuf-based codegen integrated with the Maven build system, you can use
         -->
         <protocArtifact>com.google.protobuf:protoc:3.0.0-beta-2:exe:${os.detected.classifier}</protocArtifact>
         <pluginId>grpc-java</pluginId>
-        <pluginArtifact>io.grpc:protoc-gen-grpc-java:0.13.1:exe:${os.detected.classifier}</pluginArtifact>
+        <pluginArtifact>io.grpc:protoc-gen-grpc-java:0.13.2:exe:${os.detected.classifier}</pluginArtifact>
       </configuration>
       <executions>
         <execution>
@@ -116,7 +116,7 @@ protobuf {
   }
   plugins {
     grpc {
-      artifact = 'io.grpc:protoc-gen-grpc-java:0.13.1'
+      artifact = 'io.grpc:protoc-gen-grpc-java:0.13.2'
     }
   }
   generateProtoTasks {