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/custom.cpp

@@ -43,10 +43,6 @@
 #include "util.h"
 #include "main.h"
 
-#ifdef HAVE_LIBNCURSES
-#include <ncurses.h>
-#endif
-
 extern Context context;
 static std::vector <std::string> customReports;