Make describe a little more graceful

- Leaflists and actions are already implemented, so enable that for
describe.

- Notifications and anyxml aren't implemented yet, this patch makes them
not crash the cli. But I think it's a better user experience if the
exception gets caught (rather than crash the CLI).

Change-Id: Ifea1b413e15374d3006bce0aad964df515c5dec3
diff --git a/src/cli.cpp b/src/cli.cpp
index 3118d94..a2c9cdc 100644
--- a/src/cli.cpp
+++ b/src/cli.cpp
@@ -255,6 +255,8 @@
             std::cerr << ex.what() << std::endl;
         } catch (std::runtime_error& ex) {
             std::cerr << ex.what() << std::endl;
+        } catch (std::logic_error& ex) {
+            std::cerr << ex.what() << std::endl;
         }
 
         lineEditor.history_add(line);