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/command.cpp

@@ -45,10 +45,6 @@
 #include "../auto.h"
 #include "Transport.h"
 
-#ifdef HAVE_LIBNCURSES
-#include <ncurses.h>
-#endif
-
 extern Context context;
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -836,10 +832,6 @@ int handleVersion (std::string& outs)
         << "unknown"
 #endif
 
-#ifdef HAVE_LIBNCURSES
-        << "-ncurses"
-#endif
-
 #ifdef HAVE_LIBREADLINE
         << "-readline"
 #endif