Updated documentation for the eventing. Removed preliminary tag from the Command events.

Author: craiggwilson

Docs/reference/content/what_is_new.md

@@ -20,6 +20,11 @@ The 2.1 driver ships with a number of new features. The most notable are discuss
 
 ## LINQ
 
-[CSHARP-935](https://jira.mongodb.org/browse/CSHARP-935) LINQ support has been rewritten and now targets the aggregation framework. It is a more natural translation and enables many features of LINQ that were previously not able to be translated.
+[CSHARP-935](https://jira.mongodb.org/browse/CSHARP-935) - LINQ support has been rewritten and now targets the aggregation framework. It is a more natural translation and enables many features of LINQ that were previously not able to be translated.
 
-Simply use the new [`AsQueryable`]({{< apiref "M_MongoDB_Driver_IMongoCollectionExtensions_AsQueryable__1" >}}) method to work with LINQ.
+Simply use the new [`AsQueryable`]({{< apiref "M_MongoDB_Driver_IMongoCollectionExtensions_AsQueryable__1" >}}) method to work with LINQ.
+
+
+## Eventing Implementation
+
+[CSHARP-1374](https://jira.mongodb.org/browse/CSHARP-1374) - An eventing API has been added allowing a user to subscribe to one or more events from the core driver for insight into server discovery, server selection, connection pooling, and commands.

src/MongoDB.Driver.Core/Core/Events/CommandFailedEvent.cs

@@ -20,7 +20,6 @@
 
 namespace MongoDB.Driver.Core.Events
 {
-    /// <preliminary/>
     /// <summary>
     /// Occurs when a command has failed.
     /// </summary>

src/MongoDB.Driver.Core/Core/Events/CommandStartedEvent.cs

@@ -19,7 +19,6 @@
 
 namespace MongoDB.Driver.Core.Events
 {
-    /// <preliminary/>
     /// <summary>
     /// Occurs when a command has started.
     /// </summary>

src/MongoDB.Driver.Core/Core/Events/CommandSucceededEvent.cs

@@ -20,7 +20,6 @@
 
 namespace MongoDB.Driver.Core.Events
 {
-    /// <preliminary/>
     /// <summary>
     /// Occurs when a command has succeeded.
     /// </summary>