Enhancements - Config

- Added processing for context.config overrides, and associated
  argc,argv handling.
- Bug fix in filt.t.cpp, but three tests still fail.  Too big a
  distraction to fix right now.
- Warning: build is not broken, but task is broken.

src/report.cpp

@@ -35,7 +35,7 @@
 #include <pwd.h>
 #include <time.h>
 
-#include "Config.h"
+#include "Context.h"
 #include "Date.h"
 #include "Table.h"
 #include "TDB.h"