Eliminated ncurses

- Removed autoconf ncurses detection.
- Modified man pages.
- Inserted vitapi replacement code.
- Cached terminal size values for reuse.
- Modified packaging info for OSX.
- Removed -lncurses from unit test makefile.
- Removed obsolete taskrc example.
- Modified (simplified) source build instructions.

src/report.cpp

@@ -47,10 +47,6 @@
 #include <util.h>
 #include <main.h>
 
-#ifdef HAVE_LIBNCURSES
-#include <ncurses.h>
-#endif
-
 static void countTasks (const std::vector <Task>&, const std::string&, const std::string&, int&, int&);
 
 extern Context context;