Code Cleanup

- Integrated Context.config.
- Eliminated Config& as a function argument.
- Added extern references to Context where needed.

src/tests/subst.t.cpp

@@ -24,10 +24,13 @@
 //     USA
 //
 ////////////////////////////////////////////////////////////////////////////////
+#include <Context.h>
 #include <T2.h>
 #include <Subst.h>
 #include <test.h>
 
+Context context;
+
 ////////////////////////////////////////////////////////////////////////////////
 int main (int argc, char** argv)
 {