Sketch Request: Play Bell on Button Press (memory, SD card, and HTTP)

[youmustfight]

A few variations of sound playing would be nice to get a sense of IO from different locations. I'd love to see a simple play sound on device startup, from the file being included in the upload, to being accessed from an external SD card, to making a HTTP request and playing it buffered (streaming if someones feeling excited).

This can also demonstrate the differences of working with uncompressed/compressed formats. Seems like uncompressed is the way to go, so the API should demonstrate converting a MP3 to WAV before sending that. It could also be nice to do one example with a large file and how that affects memory allocation.