Enhancement - Record object

- Added Record::Record (const std::string&)
- Added basic unit test for Record, which currently throws.

src/Record.h

@@ -29,6 +29,7 @@
 
 #include <vector>
 #include <map>
+#include <string>
 #include "Att.h"
 
 class Record : public std::map <std::string, Att>
@@ -36,12 +37,12 @@ class Record : public std::map <std::string, Att>
 public:
   Record ();                         // Default constructor
   Record (const Record&);            // Copy constructor
+  Record (const std::string&);       // Copy constructor
   Record& operator= (const Record&); // Assignment operator
   virtual ~Record ();                // Destructor
 
-  virtual std::string composeCSV () = 0;
-
   std::string composeF4 ();
+  std::string composeCSV ();
   void parse (const std::string&);
 
   std::vector <Att> all ();