[cvs-nhc98] patch applied (nhc98): update docs for a 1.20 release

[Malcolm Wallace]

Fri Nov 23 03:47:44 PST 2007  Malcolm.Wallace at cs.york.ac.uk
  * update docs for a 1.20 release

    M ./docs/copyright.html -3 +3
    M ./docs/download.html -76 +39
    M ./docs/extensions.html -1 +4
    M ./docs/history98.html -3 +9
    M ./docs/index.html -6 +5
    M ./docs/libraries.html -5 +14
    M ./docs/status.html -9 +27