Consolidate to a single 'cp' task
Consolidate to a single 'cp' task

* This eliminates the '__tests__' directory in the .zip file created
  in the 'release' task.
tabwrangler/tabwrangler,jacobSingh/tabwrangler,jacobSingh/tabwrangler,tabwrangler/tabwrangler,tabwrangler/tabwrangler