Add checking, logging, and error reporting.

Check the charList, cmap, glyf table all match.
Fix handling of multiple chars per glyph.
Handle the base but not charList not be persisted.
Release the lock when setFont fails.
Add error reporting.
Add more timing reports.
Add char fetch-count and miss-rate.
Report when fonts are seen on the page.
Improve locking for requesting and persisting the data.
Fix surrogate support in loadChars.
Fix the NotoSansJP weight numbers.
Lots of minor fixes and cleanups.
Partial cleanup of the demo code.
Developing a GAE Java server.