Trying and failing to parse tags from unsupported files is probably
costly (requires reading from SD card), and it probably slows down
indexing large collections that include a lot of non-audio files (like
cover art, etc).
This limits tag parsing to only files that have extensions for
supported audio formats. It assumes that folks don't have audio files
in supported formats with crazy extensions (e.g. an mp3-formatted file
with the extension .lol). Since this hardcodes a list of supported file
extensions for tag parsing, it'll need to be maintained later if more
formats are supported. The file ext matching is case-insensitive.
Fixes#149
I was confused about why setting the level to something lower didn't
seem to work, so this attempts make it more clear that not all log
levels are actually available on release builds.
Fixes#155
I think this is what most folks would expect to happen if BT is
disconnected/disabled and the headphones are removed.
Also, I think(?) this fixes one situation where the device doesn't idle/
sleep when folks would expect it to (not connected to headphones or bt).
