cl: Update the c-lightning installation instructions

Also explain the version numbering scheme.

04_node_client.asciidoc

@@ -493,7 +493,7 @@ Next, we will copy the latest version of c-lightning from the source code reposi
 
 [source,bash]
 ----
-$ git clone https://github.com/ElementsProject/lightning.git
+$ git clone --recurse https://github.com/ElementsProject/lightning.git
 Cloning into 'lightning'...
 remote: Enumerating objects: 24, done.
 remote: Counting objects: 100% (24/24), done.
@@ -596,12 +596,12 @@ In order to verify that the +lightningd+ and +lightning-cli+ commands have been
 [source,bash]
 ----
 $ lightningd --version
-v0.8.1rc2
+v0.10.1-34-gfe86c11
 $ lightning-cli --version
-v0.8.1rc2
+v0.10.1-34-gfe86c11
 ----
 
-You may see a different version from that shown above as the software continues to evolve long after this book is published. However, no matter what version you see, the fact that the commands execute and respond with version information means that you have succeeded in building the c-lightning software.
+The version consists of the latest release version (v0.10.1) followed by the number of changes since the release (34) and finally a hash identifying exactly which revision (fe86c11). You may see a different version from that shown above as the software continues to evolve long after this book is published. However, no matter what version you see, the fact that the commands execute and respond with version information means that you have succeeded in building the c-lightning software.
 
 === The Lightning Network Daemon (LND) node project