Date ranges are now specified by appending "?days=num" to the URL, rather than "/num"

Before, specifying how many days to go back looked like:
/log/json/source/22/
to get the 22nd day, but going back 22 days isn't a resource in itself, it's just a different way of viewing the Source resource
Now, it looks like:
/log/json/source/?days=22
which, from my understanding, is more in keeping with REST URI best-practices.