Merge pull request #946 from dapomeroy/update_documentation

Fix Command Reference in docs

Author: dapomeroy

lib/ramble/docs/command_index.in

@@ -0,0 +1,6 @@
+=================
+Command Reference
+=================
+
+This is a reference for all commands in the Ramble command line interface.
+The same information is available through :ref:`ramble-help`.

lib/ramble/docs/conf.py

@@ -53,6 +53,7 @@
         "ramble",
         "commands",
         "--format=rst",
+        "--header=command_index.in",
         "--update=command_index.rst",
     ]
     + glob("*rst")