doc: update doc version menu for v0.2 release

Update conf.py selector list to include version 0.2 documentation (and
fix an URL typo in the release notes).

Signed-off-by: David B. Kinder <david.b.kinder@intel.com>

doc/conf.py

@@ -188,6 +188,7 @@ else:
 html_context = {
    'current_version': current_version,
    'versions': ( ("latest", "/latest/"),
+                 ("0.2", "/0.2/"),
                  ("0.1", "/0.1/"),
                )
     }