Update to mined-2000.15.

Character encoding support enhancements:
* Updated to Unicode 5.1; added XHC Hanyu pinyin pronunciation information.
* Enhanced character information display, also in non-UTF-8 text encoding.
  Adding Unicode character name and Unicode decomposition, see Info menu.
* Enhanced character substitution display for non-Unicode terminals;
  using base character according to Unicode decomposition.
* Encoding conversion from UTF-8 enhanced to all text encodings.
* Enhanced terminal support for cygwin 1.7, including UTF-8 mode.
* Character replacement commands (e.g. ESC _) also unescape
  URL escape notation (%E2%82%AC) and HTML numeric entities (&_#x20AC;).

Text editing features:
* Enhanced line begin/end navigation, may also go to previous/next line.

Interactive:
* Changed cursor positioning when moving vertically over multi-column characters
  * Turning to the closest side of a TAB.
  * Options -T/+T for preference to stay left/right of TAB.
* Enhanced menu navigation (Ctrl-mouse-scroll, initial key word finding).
* Multi-option selection in open Info display ("?") menu.
* Scrollbar mouse control enhancements:
  * Scroll direction adapted to other applications (old mode with option -oo).
  * Click-and-drag scrollbar scrolling.
  * Accelerated scrolling (by half a page) while over scrollbar.
* Added usage hints to messages on typical keyboard interaction misconceptions.
* Help function improvements.
* Tweaked handling of Home/End/Del and modified keypad keys.

Interworking enhancements:
* Distinction of small/numeric keypad keys for djgpp-compiled DOS version.
* Tweaked uterm terminal invocation script:
  * Workaround to safely ensure UTF-8 on cygwin.
  * Best guess for user preference of rxvt (if rxvt-unicode is found).
  * Command line options for user preference for xterm or rxvt.
* Tweaked cygwin script wmined to use mintty if available.
* Tuned keypad assignments to achieve more uniform keypad functions
  among different kinds of terminals as much as possible.
* Support of additional terminal codepages as supported by cygwin 1.7,
  also in the djgpp-compiled DOS version.
* Recognising and adapting to PuTTY or MinTTY.

Printing:
* Added printing feature using notepad /p for cygwin and DOS versions.

Miscellaneous:
* Applying computed dim screen attribute for line indications (in xterm),
  actived by defining an empty environment variable MINEDDIM.
* Revised/enhanced line end handling support:
  * Added option +r to convert Unix lineends (LF) to DOS lineends (CRLF).
  * Enhanced Mac lineend handling options -R and +R.
  * Either of -r/+r can be combined with either of -R/+R.
  * Added search pattern "\r" to search for CRLF (DOS/Windows) line ends.


(tnn)