+ update autoconf patch to 2.52.20120811, adding --datarootdir
(prompted by discussion with Erwin Waterlander).
+ improve description of --enable-reentrant option in README and the
INSTALL file.
+ add nsterm-256color, make this the default nsterm -TD
+ remove bw from nsterm-bce, per testing with tack -TD
+ add a check to ensure that termcap files which might have "^?" do
not use the terminfo interpretation as "\177".
+ minor cleanup of X-terminal emulator section of terminfo.src -TD
+ add terminator entry -TD
+ add simpleterm entry -TD
+ improve wattr_get macros by ensuring that if the window pointer is
null, then the attribute and color values returned will be zero
(cf: 20110528).
