Just minor improvements to remove max-stale and min-fresh headers as they are request directives and might create confusion for newbies.
Improved the tests by removing the max-stale and min-fresh headers, a…
…s they are cache-busting request headers and might be a point of confusion for newbies.
I'm going to leave this unmerged. The CacheControl class is meant for parsing either request or response Cache-Control header values.