Log Message:
Update from version 1.11 to version 1.21

Pkgsrc changes:
- Add LICENSE

Upstream changes:
1.21 18.01.2010
  - bug in Builder, Gvascript.js was written to wrong location

1.20   07.01.2009
  - Element.autoScroll : fix scroll amount when the scrolling block has
    an offsetTop > 0
  - removed PAGE_UP/DOWN handlers in TreeNavigator -- let the browser deal
    with those
  - treeNavigator select() has an additional param "prevent_autoscroll"
  - treeNavigator autoscroll only active through kbd, not through click
  - treeNavigator observes "mouseup" (instead of mousedown or click)
  - autoCompleter bug fix on detach (stop observing "click")
  - protoExtensions : removed RegExp.escape() (now in prototype.js)
  - autoCompleter div, display above only if enough vertical space
  - autoCompleter : code layout improvements

1.18 13.10.2009
  - fix some minor doc glitches released in 1.17

1.17 13.10.2009
  - major revision from Mona Remlawi
  - new Grid component
  - new CustomButtons component
  - new Paginator component
  - new test suite