Forked from: https://github.com/Patashu/break_infinity.js

My version of break_infinity.js I mostly doing random changes to fit with my game's code!

• Removed Decimal.toString() and Decimal.toJson(), since it doesn't allow you to use JSON.Stringify() (at least i remember it being so, probably need to recheck that one. but anyway main reason i did it, Decimal object wasn't able to correctly be saved/loaded with json because of it. now it works like a charm)
• Added doPlus, doMinus, doTimes, doDivide functions, to change a Decimal object in-place, without creating a new one