Add license file.
Add description.
Add source-repository information.
Add wrappers for events.

Also beef up the newtypes to be a little bit more flexible.
Remove unneeded pattern matches.
Add the rest of the events, and use a combinator to ease things.
Export a couple types and constructors.
Bring in some new dependencies.

And bump the package version.
Harden loadSF and add unloadSF.
examples/Dover: Add a tailing pause to make the last note audible.
Export a couple types.
Keep settings alive for synths.
Bump for modifying the API and types.