Add What's New and Upgrading reference documentation for the 3.3 release

Author: jyemin

docs/reference/content/driver/reference/connecting/authenticating.md

@@ -116,7 +116,7 @@ See the MongoDB server
 [x.509 tutorial](http://docs.mongodb.org/manual/tutorial/configure-x509-client-authentication/#add-x-509-certificate-subject-as-a-user) for
 more information about determining the subject name from the certificate.
 
-## Kerberos (GSSAPI)
+## Kerberos (GSSAPI) {#gssapi}
 
 [MongoDB Enterprise](http://www.mongodb.com/products/mongodb-enterprise) supports proxy authentication through a Kerberos service.  To
 create a credential of type [Kerberos (GSSAPI)](http://docs.mongodb.org/manual/core/authentication/#kerberos-authentication) use the

docs/reference/content/whats-new/index.md

@@ -7,17 +7,18 @@ title = "What's New"
   pre = "<i class='fa fa-cog'></i>"
 +++
 
-# What's New in 3.2
+# What's New in 3.3
 
-Key new features of the 3.2 driver include:
+New features of the 3.3 driver include:
 
-- Support for bypassing [document validation]({{< docsref "release-notes/3.2/#document-validation" >}}) on collections where document 
-validation has been enabled. 
-- Builder support for new [aggregation stages]({{< docsref "release-notes/3.2/#new-aggregation-stages" >}}) 
-and [accumulators]({{< docsref "release-notes/3.2/#new-accumulators-for-group-stage" >}}) for the $group stage.
-- Support for [read concern]({{< docsref "release-notes/3.2/#readconcern" >}}).
-- Support for [version 3 text indexes]({{< docsref "release-notes/3.2/#text-index-version-3" >}})
-- Support for write concern on all DBCollection helpers for the findandmodify command
+- [Cluster Monitoring]({{<ref "driver/reference/management/monitoring.md#cluster-monitoring">}}) in the synchronous and asynchronous
+drivers
+- [Command Monitoring]({{<ref "driver/reference/management/monitoring.md#command-monitoring">}}) in the asynchronous driver
+(support in the synchronous driver was added in a previous release)
+- Additional query parameters in the [connection string]({{<ref "driver/reference/connecting/connection-settings.md#connection-string">}})
+- [GridFS]({{<ref "driver-async/reference/gridfs/index.md">}}) in the asynchronous driver
+- Additional configuration options for [GSSAPI authentication]({{<ref "driver/reference/connecting/authenticating.md#gssapi">}}).
+- [JNDI]({{<ref "driver/reference/connecting/jndi.md">}}) ObjectFactory implementation
 
 ## Upgrading
 

docs/reference/content/whats-new/upgrading.md

@@ -8,9 +8,9 @@ title = "Upgrading to 3.2"
   pre = "<i class='fa fa-wrench'></i>"
 +++
 
-# Upgrading from 3.1.x
+# Upgrading from 3.2.x
 
-The 3.2 release is binary and source compatible with the 3.1 release, except for methods that have been added to interfaces that have 
+The 3.3 release is binary and source compatible with the 3.2 release, except for methods that have been added to interfaces that have
 been marked as unstable.
 
 # Upgrading from 2.x