Log Message:
Update from version 1.11 to version 1.13.

Pkgsrc changes:
- Add LICENSE
- Adjust dependencies
- Add recommended dependencies

Upstream changes:
1.13
  - ignoring dirs starting with '.'
  - no HTML rendering for perltoc (too slow)
  - support for perlvar
  - computing TOC layout, works for MSIE6, MSIE8, FF, Chrome and Safari
  - many JS fixes (done in Alien-GvaScript 1.20)
  - applied patch by Elliot Shank for specifiying the page title
  - tested on MSIE8, FF3.5, safari4, Chrome3

1.12
  - sync TOC, automatically open nodes in TOC
  - support aliases in links L<alias|http://...>
  - fixed bugs in URLs containing special chars like L<http://foo$/...>
  - disabled automatic links within text nodes
  - links to external resources will open in a blank page
  - fixed bugs in displaying scripts (as opposed to modules)
  - toc ignores directories starting with '.'
  - toc_pragmas ignores "pod", "pods" and "inc" subdirs