s/is/if/
Merge pull request #1495 from tschaub/reference-typo

Minor typo in reference doc
update docs to include details on the `app` and `plugins` properties of route config.
Merge pull request #1501 from stephen-bartell/master

update docs to include details on the `app` and `plugins` properties of ...
Fix #1501
plugin.method bug. Closes #1503