Feature #415

- Added feature #415, which supports displaying just a single page of tasks,
  by specifying either 'limit:page' to a command, or 'report.xxx.limit:page'
  in a report specification (thanks to T. Charles Yun).
- Modified the 'next' report to only display a page, by default.

src/Table.h

@@ -92,7 +92,7 @@ public:
 
            int rowCount ();
            int columnCount ();
-           const std::string render (int maximum = 0);
+           const std::string render (int maxrows = 0, int maxlines = 0);
 
 private:
            std::string getCell (const int, const int);