Centralized Workspaces

Create a consistent means for creation and management of Tempest
workspaces.

Creates a file located at ~/.tempest/workspaces.yaml which stores existing
workspaces.

Available subcommands: list, register, rename, move, remove

bp centralized-workspaces

Change-Id: I9595e3ba809e457951a0ffdf4b15f641f2fec4f4
diff --git a/doc/source/index.rst b/doc/source/index.rst
index 10364db..98b006d 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -51,6 +51,7 @@
    account_generator
    cleanup
    javelin
+   workspace
 
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 Indices and tables