docs/api: add the repo layout in ascii art
    
        | author | Steve Losh <steve@stevelosh.com> | 
    
        | date | Mon, 12 Jul 2010 23:38:39 -0400 | 
    
    
        | parents | 6c9b5986c7e1 | 
    
        | children | d3edf7c43e7a | 
    
        | branches/tags | initial-docs | 
    
        | files | docs/api.rst | 
Changes
    
--- a/docs/api.rst	Mon Jul 12 23:28:47 2010 -0400
+++ b/docs/api.rst	Mon Jul 12 23:38:39 2010 -0400
@@ -19,11 +19,44 @@
 subprocesses to avoid breaking, but this is a tradeoff that the author feels is
 worth making.
 
-Data Repository
----------------
+Data Repository Layout
+----------------------
+
+The structure of hg-review's data repository looks like this::
+
+    your-project/
+    |
+    +-- .hg/
+    |   |
+    |   +-- review
+    |   |   |
+    |   |   +-- {{ changeset hash }}
+    |   |   |   |
+    |   |   |   +-- .exists
+    |   |   |   |
+    |   |   |   +-- comments
+    |   |   |   |   |
+    |   |   |   |   +-- {{ comment hash }}
+    |   |   |   |   |
+    |   |   |   |   `-- other comments...
+    |   |   |   |
+    |   |   |   +-- signoffs
+    |   |   |       |
+    |   |   |       +-- {{ signoff hash }}
+    |   |   |       |
+    |   |   |       `-- other signoffs ...
+    |   |   |
+    |   |   `-- other changesets ...
+    |   |
+    |   `-- other files ...
+    |
+    `-- other files ...
 
 File Formats
 ------------
 
+Command Line Interface
+----------------------
+
 Python API
 ----------