v6.31.5. Improvement.

- v6.31.5 April 25, 2013
	- Progress bars now obey the `prompts` configuration option instead of
v6.31.2 environment hack
v6.31.6. Improvement.

- v6.31.6 April 26, 2013
	- `X-Powered-By` now also includes the DocPad version number