Enhancement - StringTable integration

- StringTable now integrated into Context.
- Docs updated for new "locale" configuration variable.
- StringTable unit tests implemented.

src/StringTable.h

@@ -39,7 +39,7 @@ public:
   ~StringTable ();                                      // Destructor
 
   void load (const std::string&);
-  std::string get (int);
+  std::string get (int, const std::string&);
 
 private:
   std::map <int, std::string> mMapping;