Update current version in reference documentation to 3.1.1

Author: jyemin

docs/reference/content/bson/installation-guide.md

@@ -22,4 +22,4 @@ This library comprehensively supports [BSON](http://www.bsonspec.org),
 the data storage and network transfer format that MongoDB uses for "documents".
 BSON is short for Binary [JSON](http://json.org/), is a binary-encoded serialization of JSON-like documents.
 
-{{< install artifactId="bson" version="3.1.0" >}}
+{{< install artifactId="bson" version="3.1.1" >}}

docs/reference/content/driver-async/getting-started/installation-guide.md

@@ -22,4 +22,4 @@ The MongoDB Async Driver requires either [Netty](http://netty.io/) or Java 7.
 ## MongoDB Async Driver
 The new asynchronous API that can leverage either Netty or Java 7's AsynchronousSocketChannel for fast and non-blocking IO.
 
-{{< install artifactId="mongodb-driver-async" version="3.1.0" dependencies="true">}}
+{{< install artifactId="mongodb-driver-async" version="3.1.1" dependencies="true">}}

docs/reference/content/driver/getting-started/installation-guide.md

@@ -28,7 +28,7 @@ For OSGi-based applications: due to the fact that there are classes from the `co
 jar (described below) instead. 
 {{% /note %}}
 
-{{< install artifactId="mongodb-driver" version="3.1.0" dependencies="true">}}
+{{< install artifactId="mongodb-driver" version="3.1.1" dependencies="true">}}
 
 
 ## Uber MongoDB Java Driver
@@ -38,4 +38,4 @@ An uber jar that contains everything you need; the BSON library, the core librar
 For OSGi-based applications: this artifact is a valid OSGi bundle. 
 {{% /note %}}
 
-{{< install artifactId="mongo-java-driver" version="3.1.0">}}
+{{< install artifactId="mongo-java-driver" version="3.1.1">}}