ncurses 5.9 - patch 20140621

+ change shared-library suffix for AIX 5 and 6 to ".so", avoiding
  conflict with the static library (report by Ben Lentz).
+ document RPATH_LIST in INSTALLATION file, as part of workarounds for
  upgrading an ncurses library using the "--with-shared" option.
+ modify test/ncurses.c c/C tests to cycle through subsets of the
  total number of colors, to better illustrate 8/16/88/256-colors by
  providing directly comparable screens.
+ add test/dots_curses.c, for comparison with the low-level examples.