Unit Tests - Config

- Added unit tests for Config.  Why didn't I do this a year ago?
- Shut off old 1.7.0 code (gulp).
- Task now thoroughly broken, and only 1.8.0 can help.

src/Context.h

@@ -41,8 +41,6 @@ class Context
 {
 public:
   Context ();                          // Default constructor
-  Context (const Context&);            // Copy constructor
-  Context& operator= (const Context&); // Assignment operator
   ~Context ();                         // Destructor
 
   void initialize (int, char**);       // all startup