Force gzip

This plugin implements gzip output compression to speed up load times.

The plugin also does a check to see if browsers are incorrectly saying that they do not support GZIP when they actually do. This can speed up load times for a significant portion of users.

For requests with missing or mangled Accept-Encoding headers, inspect the User-Agent to identify browsers that should understand gzip.
* Test their ability to decompress gzip.
* If successful, send them gzipped content!

See:

• http://www.stevesouders.com/blog/2010/07/12/velocity-forcing-gzip-compression/
• http://en.oreilly.com/velocity2010/public/schedule/detail/14334
• http://wpdevel.wordpress.com/2010/07/13/forcing-gzip-httpwww-stevesouders-co/