Allow for subfolders in the BloomExternal folder

We produce hundreds of MicroSd cards with Bloom books on them. When you place the books in a folder named ‘BloomExternal’, the Bloom Reader will read them directly from the MicroSd card and it doesn’t need to copy them to the internal memory of the phone. Since the internal memory of most phones that we come across is normally 98% full, this is an amazing way for distributing books.

Currently, the Bloom Reader won’t read any books from folders within the BloomExternal folder, which makes it very difficult to manage the content.