It turns out that I had already renamed AldaPlayFile to AldaPlayBuffer, but
forgot to update the help text to reflect the change.
I like calling it a Buffer in the command instead of a File, because File
implies that you have to save the file and the file is what's getting passed to
Alda, when what we're really doing is piping all the text in the buffer into
Alda -- which is more convenient because you don't have to save the file first.
- The `--lisp` option is no longer supported, so parsing fails altogether.
Updated the `alda parse` command we run to not use this flag, so it works
again.
- The output is JSON now, not Lisp code. As a convenience, vim-alda will
recognize when you have `jq` on your $PATH and use it to pretty-print the
JSON so that it's readable.
- Changed the parse mapping from <localleader>l to <localleader>s. The old
mnemonic was L for "Lisp," but now that we aren't generating Lisp code, the
new mnemonic is S for "Score."
