added more extensive test for rsdataservice and subsequent bug fixes.

added test for RsNxsTransac item. 
applied rule of three to RsTlvBinaryData (destructor, assign op, copy constructor implemented)

git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-new_cache_system@5196 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/gxs/rsdataservice.h

@@ -117,6 +117,7 @@ public:
      * Completely clear out data stored in
      * this data store and returns this to a state
      * as it was when first constructed
+     * This also clears any data store items created in service directory
      */
     int resetDataStore();
 
@@ -125,6 +126,7 @@ private:
 
     RsNxsMsg* getMessage(RetroCursor& c);
     RsNxsGrp* getGroup(RetroCursor& c);
+    void initialise();
 
 private: