add cookstyle support to fix #617

[indygwyn]

No description provided.

[sds]

Overall looks great, @indygwyn. Just needs the default configuration updated so the tests pass.

[sds]

Indentation looks slightly off here, which may explain why the tests failed.

[indygwyn]

isn't it ironic my updating of a style linter enforcer gets caught by a style linting problem

[indygwyn]

Not sure how I can fix that check in AppVeyor that's failing
Check for broken symlinks............................[BrokenSymlinks] FAILED ...um

[sds]

I would ignore the symlink error in AppVeyor, @indygwyn.

I missed this in my last review, but can you add an accompanying test? You can see an example from another recent pull request here: https://github.com/brigade/overcommit/pull/616/files#diff-2da0444d3bba168fda49f24b7abe274d

[indygwyn]

@sds Okay, I tried writing my own rspec's but I kept getting an error, so I reverted to just a copy of rubocop's which should work fine since cookstyle is just a wrapper around rubocop, hopefully this works for ya.

[sds]

Thanks @indygwyn!