Log Message:
Update to 5.5.0:
5.5.0
- fixed bug of non repainting of bottom part of window under some
  vt100 terminals (NK).

5.3.2
- use /struct termdesc/ instead of /int/ for terminal type
- compiler warnings cleanup

5.3.1
- changed default prefix to /usr/local, cosmetic fixes

5.3.0
- BIEW/LINUX: reduce use of system calls, use pwrite if possible,
        keyboard functions reimplemented using async IO,
        added proper pseudographics support on xterms
        (with G1 charset) and console (with null map),
        autodetection of vcsaN number,
        "Save as" codepage conversion fixed.
- BIEW/SLANG: wrap lines in WriteBuff when buffer length exceeds
        terminal width - thanks to John Davis for helping me out.
- BIEW/CURSES: added mouse support (ncurses are required for this),
        added acs_map ncurses hack.
- BIEW/VT100: added proper pseudographics support (with G1 charset),
        keyboard functions reimplemented using async IO,
        added mouse support on Linux systems (gpm).
- use getpwuid() to determine home directory when HOME is unavailable
- reduce malloc()/free() calls in vioWriteBuff()
- moved default datadir from /usr/lib/biew to /usr/share/biew