Diagnostics

- Added new 'diagnostics' command to assist with bug reporting,
  testing.  It answers questions such as "did you compile it yourself?",
  and more.
- Specifically, it runs a UUID generation test to prove that the UUIDs
  are really unique.

src/import.cpp

@@ -1254,7 +1254,7 @@ static std::string importYAML (const std::vector <std::string>& lines)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-int handleImport (std::string &outs)
+int handleImport (std::string& outs)
 {
   int rc = 0;