Docs site: Updated reference landing pages

Author: jyemin

docs/reference/content/reference/bson/index.md

@@ -12,4 +12,4 @@ title = "BSON"
 The driver comprehensively supports [BSON](http://www.bsonspec.org), the data storage and network transfer format that MongoDB uses for 
 “documents". BSON, short for Binary [JSON](http://json.org/), is a binary-encoded serialization of JSON-like documents.
 
-- [MongoDB Extended JSON]({{< relref "extended-json.md" >}})
+- [MongoDB Extended JSON]({{< relref "extended-json.md" >}}): Documentation of the driver's support for MongoDB Extended JSON

docs/reference/content/reference/index.md

@@ -6,12 +6,13 @@ title = "Reference"
   pre = "<i class='fa fa-book'></i>"
 +++
 
-## Reference Page index
+## Reference
 
-The reference documentation is not an API reference. You can review those [here](http://api.mongodb.org/java/3.0/). Instead, the 
-reference documentation will focus on high-level documentation and use-cases.  
+The reference documentation for the Java driver focuses on high-level documentation and use-cases. The Javadoc-generated API reference is
+[here](http://api.mongodb.org/java/3.0/).    
 
-- [BSON]({{< relref "reference/bson/index.md" >}})
-- [Connecting]({{< relref "reference/connecting/index.md" >}})
-- [Management]({{< relref "reference/management/index.md" >}})
+- [BSON]({{< relref "reference/bson/index.md" >}}): Documentation of the driver's support for [BSON](http://www.bsonspec.org)
+- [Connecting]({{< relref "reference/connecting/index.md" >}}): Documentation of the driver's support for connecting to MongoDB servers
+- [Management]({{< relref "reference/management/index.md" >}}): Documentation of the driver's support for logging and monitoring of its 
+internal state