Log Message:
Update from version 0.30 to 0.37.

Pkgsrc changes:
 o Add p5-String-BufferStack as a dependency.

Upstream changes:

0.37 - 2009-02-19
* Make HTML::Lint an optional dependency

0.36 - 2009-02-05
* Hint to the source of the buffer using a 'from' argument.  This
  allows us to inspect the call stack by looking at the buffer stack.

0.35 - 2009-01-20
* Buffers have been moved to using String::BufferStack, for better
  interopability with other templating systems.  Code which
  manipulated Template::Declare::Buffer objects by hand may need to be
  adjusted.

0.31_01 - 2008-12-19
* INCOMPATIBLE: there were inconsistency in arguments passing.
  show in TD::Tags could pass arguments into template as array
  reference depending on a way it's called. Now arguments
  are always passwed the same way they passed into show.

  This change is only backwards incompatible for those who
  were using this incorrect behaviour.

* stringify argument in TD::Buffer::append as we can deal with
  an object with overloaded stringification that puts data into
  buffer when stringified
* correctly escape objects with overloaded stringification
* use less buffers for operations and a few other small optimizations