[FAB-9114] Add references/links for all 5 Fabric SDKs

Add references and links to both the two official SDKs (Node and Java),
as well as the unofficial ones (Python, Go and REST).

Change-Id: Ib1884e6e046da644bd4d85656294931e6784f3d9
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>

docs/source/getting_started.rst

@@ -40,12 +40,18 @@ bookmark those links now.
 Hyperledger Fabric SDKs
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-Hyperledger Fabric intends to offer a number of SDKs for a wide variety of
-programming languages. The first two delivered SDKs are the Node.js and Java
-SDKs. We hope to provide Python, REST and Go SDKs in a subsequent release.
+Hyperledger Fabric offers a number of SDKs to support various programming
+languages. There are two officially released SDKs for Node.js and Java:
 
-  * `Hyperledger Fabric Node SDK documentation <https://fabric-sdk-node.github.io/>`__.
-  * `Hyperledger Fabric Java SDK documentation <https://github.com/hyperledger/fabric-sdk-java>`__.
+  * `Hyperledger Fabric Node SDK <https://github.com/hyperledger/fabric-sdk-node>`__ and `Node SDK documentation <https://fabric-sdk-node.github.io/>`__.
+  * `Hyperledger Fabric Java SDK <https://github.com/hyperledger/fabric-sdk-java>`__.
+
+In addition, there are three more SDKs that have not yet been officially released
+(for Python, Go and REST), but they are still available for downloading and testing:
+
+  * `Hyperledger Fabric Python SDK <https://github.com/hyperledger/fabric-sdk-py>`__.
+  * `Hyperledger Fabric Go SDK <https://github.com/hyperledger/fabric-sdk-go>`__.
+  * `Hyperledger Fabric REST SDK <https://github.com/hyperledger/fabric-sdk-rest>`__.
 
 Hyperledger Fabric CA
 ^^^^^^^^^^^^^^^^^^^^^

docs/source/glossary.rst

@@ -325,8 +325,11 @@ for developers to write and test chaincode applications. The SDK is fully
 configurable and extensible through a standard interface. Components, including
 cryptographic algorithms for signatures, logging frameworks and state stores,
 are easily swapped in and out of the SDK. The SDK provides APIs for transaction
-processing, membership services, node traversal and event handling. The SDK
-comes in multiple flavors: Node.js, Java. and Python.
+processing, membership services, node traversal and event handling.
+
+Currently, the two officially supported SDKs are for Node.js and Java, while three
+more -- Python, Go and REST -- are not yet official but can still be downloaded
+and tested.
 
 .. _State-DB: