Controller methods used in around_actions shouldn't be considered unused

[trliner]

The gem currently considers methods used in an around_filter to be used but methods used in an around_action to be unused. Since Rails is now discouraging the use of the *_filter family of methods (see Rails 4.2 release notes), the gem should consider around_action methods to be used as well.

It seems the easiest fix for this would be to change this line from when "around_filter" to when "around_filter", "around_action". Should it be added to the list of nodes to skip for start_command callbacks also?

I can make the code changes (and add tests) if that seems like a reasonable solution.

[jcarlos]

+1