Show HN: Faster ruby I18n backend written in C

We did a two-day hackfest at work recently, and this was my project. As canvas-lms has grown, we've seen our GC runs get slower and slower, and this seemed like some good low hanging fruit (especially as we keep adding more languages).

I moved the translations out of the ruby heap, so as to speed up GC runs, and there were some other enhancements in both ruby and C to speed up lookups a bit.

It's still pretty new, so as I continue to refine I hope to bring those benchmarks even further.