examples/* using provided training files

[Byron]

It would definitely help if there was a little example program, in examples/, which can read one of the provided files and take some input for testing.
Then people can cargo test and have a look at target/examples/* for their pleasure and acquaintance with the library.
Something that taught me about the value of such things was the synth library.
Try cargo test && target/examples/test there and you will experience what I mean :).