convert_svn ("release early" edition)

[Daniel Holth]

Matt Mackall wrote:
> Taking a peek at this, some comments:
>
> interface:
>
>  Actually making your convert_whatever a base class for the other
>  classes is probably worth doing. Call it class converter.
>   
Will do.
> tzinfo:
>
>  What's this for, exactly? This probably wants to be replaced with
>  util.parsedate.
>   
A Subversion timestamp looks like this, is in UTC, and includes
microseconds. util.parsedate() doesn't handle this:
'2007-01-04T17:35:00.902377Z'

- Daniel Holth