Switch to PDK module layout

.gitignore

@@ -1,2 +1,27 @@
-# blacksmith output directory
-pkg
+.git/
+.*.sw[op]
+.metadata
+.yardoc
+.yardwarns
+*.iml
+/.bundle/
+/.idea/
+/.vagrant/
+/coverage/
+/bin/
+/doc/
+/Gemfile.local
+/Gemfile.lock
+/junit/
+/log/
+/pkg/
+/spec/fixtures/manifests/
+/spec/fixtures/modules/
+/tmp/
+/vendor/
+/convert_report.txt
+/update_report.txt
+.DS_Store
+.project
+.envrc
+/inventory.yaml