Add paths param to ./check

* This will check for changes in files that match the "paths" param
* The "paths" param is passed straight to git log, grabbing the last
  commit that that any of the files matched were touched

[#78781656]
Add support for receive a $ref while listing paths

[#78781656]
Add ignore_paths param

* Uses perl to convert globs to regexes
* Passes regexes to grep -e -v to list all paths but the ignored ones
* Overrides paths option

[#78781656]
Merge pull request #2 from luan/feature-subset-78781656

Add paths param to ./check