Basic styling of completed tasks.
Add action buttons on comments.
Use links for actions.
Start work on actions.
Merge branch 'refs/heads/master' into feature/mark-as-done

Conflicts:
	main.js
Start work on resolve button.
Render file table rows in separate function.
Start working on implementing the new filesystem API.
Merge branch 'refs/heads/feature/scoped-search'
Merge work from other branches.

Conflicts:
	html/results.html
Replace deprecated FileIndexManager.
Replace deprecated NativeFileSystem.

Resolves #21.