v2.9.0. Improvement.

- v2.9.0 May 21, 2014
	- `cache` option now defaults to one day `1000*60*60*24` to avoid superflous requests, refer to the updated readme for what the new values mean
	- `parse` option is now only a boolean
	- parsing auto-detection now checks content-types as well as the previous extension check
	- Updated dependencies