Fix Build all

I promised so much yet delivered so little.

Build All Feature

Set the build-all flag to true to build return all subdirectories in the target directory.

Fix duplicate directories

Merge pull request #9 from keiththompson/keith/dedupe

only add directory once

Marketplace release of detected-changes-action

1.0.1

prep for marketplace

First release of detected-changes-action

1.0.0

initial commit