Code Cleanup - obsolete code

- Removed obsolete T::removeAttributes.
- Removed obsolete T::sequenceContains.
- Modified handleInfo so it no longer uses T::sequenceContains, and
  instead uses filterSequence.

src/Record.h

@@ -42,6 +42,14 @@ public:
   virtual std::string composeCSV () = 0;
   void parse (const std::string&);
 
+/*
+  void getAttributes (std::map<std::string, std::string>&);
+  const std::string getAttribute (const std::string&);
+  void setAttribute (const std::string&, const std::string&);
+  void setAttributes (const std::map <std::string, std::string>&);
+  void removeAttribute (const std::string&);
+*/
+
 private:
   std::vector <Att> mAtts;
 };