Fix a loading order issue with the Railtie

By changing the Railtie to use the `initializer` method instead of a
configuration method, load inflections before initializers are run. This
fixes #6.

Signed-off-by: David Celis <me@davidcel.is>
Bump version to 3.2.11

Signed-off-by: David Celis <me@davidcel.is>