Compiler Improvements ☔

[Mathieu Dutour]

There are a lot of low hanging fruits to improve the compiler:

• use a debug helper (similar to https://www.npmjs.com/package/debug) to add some logs without polluting the output
• add a entry point for the node package so that you can do lonac.compile(...) from NodeJS without having to shell out
• allow passing the entire workspace via a { files: [] } map of some kind on stdin

[Mathieu Dutour]

fixed in #462