* Fix grammar in section describing `load_configuration`.
* Make the code python 3 compatible by providing examples with
`print` as a function, as opposed to a built-in.
Signed-off-by: Enji Cooper <yaneurabeya@gmail.com>
A new optional hook for plugins is added: `load_configuration()`.
This hook is executed after configuration is loaded to allow plugins
to provide a specific configuration tailored to their purpose (e.g.
pylint-django could set up their own set of `good_names` or blacklisted
directories)
