Replace BigDecimal with BigRational
Amount rewrite and integration complete, precision issues
throughput tweaks
sync
Added Price to handle Amount ratios
Rename Price to Ratio
Numerical precision with passable perf (~1600 tx/sec, up from ~500)
Tests passing w/ Amount/Ratio flyweights
Merge branch 'master' of github.com:buttercoin/buttercoin-engine
Merge branch 'amount-work'