Fixes and Enhancements to WinVN 0.99.8 beta-2

Fixes:
* Goh Tanaka
 newsrc (read/unread information) fixes
  1) article read/unread information of opened article list window does not
     save to newsrc when user send WM_QUIT to winvn newsgroup list window
     (pushing cross button on Win95)
  2) GroupLinePtr does not properly set at second opened newsgroup
  3) winvn does not save newsgroup name into newsrc if user attempt to open
     empty newsgroup
      wvgroup.cpp, wvusenet.cpp, wvutil.cpp

* Masaki Ishido
 URL execute fix when execute path name contains space character
      (such as default install path name for Netscape Navigator.  Enclose
       execute file path name with double quote character
  ie.  "c:\program files\netscape\navigator\netscape\program\netscape.exe" %u
      )
       wvart.cpp

* Masaki Ishido
 Posting/Mailing menu on composing window says "Mail" when canceling article

* Masaki Ishido
 Timezone info does not properly set at sending SMTP Mail on Win32 version
    (always set as "PST".  Remove ANSI functions on handling timezone info
     on Win32)
       wvheader.c

Enhancements:
* Mitsuo Shimomai & Masaki Ishido
  configurable newsgroup/article list display position
     (move mouse cursor to first line of list.  You will see mouse cursor
      shape change to right-left arrow.  At that time, You can drag the
      positions such as newsgroup name, article author name, article subject.
      This enhancement allow user to use propotional font on newsgroup/article
      list window)
        wvgroup.cpp, wvusenet.cpp, wvutil.cpp

* Mitsuo Shimomai
  Display article posted time by local time zone
        wvgroup.cpp

* Mitsuo Shimomai
  Allow user to edit header part of editing article (or mail) directly
        wvcompos.c, winvn.rc, wvhdedit.c (new file)

* Mistuo Shimomai
  Spoiler Character support (Form Feed character or ^L)
        wvart.cpp, wvscreen.c, wvcompos.c

* Masaki Ishido
  Include Operating System information in X-Newsreader: header
  (like Netscape Navigator newsreader ;-)
        wvcompos.c

from WinVN Japanese version development team:
                  Masaki Ishido (ishidou@jpn.hp.com)
                  Goh Tanaka (goh@yamato.ibm.com)
                  Mitsuo Shimomai (sim@aae.kagoshima-u.ac.jp)