Adds methods to extract info on a package from koji task results.

Adds methods to extract info on a package from koji task results.

Once you get the results of a koji task you can use these methods to
look for and extract information about a given package.  If the package
is found it will return information about how to download and consume
the rpm generated by the task.

Signed-off-by: Andrew Schoen <aschoen@redhat.com>