[dev] Kronolith calendar renaming

[Chuck Hagenbuch]

Quoting Stuart Bingë <s.binge at codefusion.co.za>:

> This is a rather small patch to allow calendars to be "renamed" in 
> the driver,
> as well as in the shares (as they currently are). I've also included a stub
> rename function in the base driver class to handle those drivers that could
> safely ignore this functionality (such as the SQL driver).

Committed, thanks!

-chuck

--
"Regard my poor demoralized mule!" - Juan Valdez