Tune the LSM a bit based on testing, increase the chunk size and add more merge
worker threads into the mix.
Add a few placeholders for missing functions.
Remove this vestige of bzip2 support.
Now matches against proper library name and prevents rebuilding when unnecessary.
Move async nif struct definition back to where it belongs.
Add a bit of statistics tracking for two reasons, a) to help inform
where a request should be enqueded and b) to track request latency.