Log Message:
Update from version 1.11 to 1.15.

Pkgsrc changes:
 o Add new dependencies; and p5-HTML-Stream appears to be not
   only a build-time dependency
 o Fix Pod::Tree::HTML to actually write to a referenced string,
   using IO::String
 o Get rid of the half-assed IO::String dummy in the html test,
   and adapt to using IO::String instead
This makes the self-tests pass.  Diffs reported upstream.

Upstream changes:

1.15    2007 Jun 24
	Rename pod2html -> podtree2html (RT 18742)

	Pod::Tree::HTML
	- Changed destination resolution to accept a scalar reference,
	  or anything with a 'print' method. (RT 12335)

        podtree2html, pods2html
	- documented HTML elements for CSS rules (RT 6118)

	pod.css
	- add example style sheet

1.14	2007 Jun 12
	Pod::Tree::HTML
	- remove use vars qw(&isa); (RT 14530)
	- document translate() error conditions (RT 12336)

	Makefile.PL
	- add Text::Template prerequisite (RT 26440)

1.13    2007 Apr 06
	Pod::Tree
	- rename the Stream package

	Pod::Tree::HTML
	- change the X<> markup to render as empty, per the perlpod manpage
	- rename the BitBucket package
	- add template support

	Pod::Tree:PerlUtil
	- handle malformed NAME paragraphs more gracefully

	pod2html
	- add template support

	pods2html
	- add template support

1.12	2006 Apr 22
	Pod::Tree::PerlBin
	- ignore non-existant directories on $PATH
	- protect File::Find::find from empty directory list

	Pod::Tree:PerlFunc
	- find the pod/ directory under either perl/ or perl/lib/ (Win32 issue)

	Pod::Tree::PerlLib
	- increase default col_width to 30

	Pod::Tree:PerlTop
	- find the pod/ directory under either perl/ or perl/lib/ (Win32 issue)

	Pod::Tree:PerlUtil
	- clean up whitespace in module names and descriptions

	pods2html
	- recursion check compares absolute paths instead of inodes (Win32 issue)

	t/pods2html.t
	- use rmtree instead of system "rm -r" (Win32 issue)