Bignumber.js Versions Save

I received reports by email that the use of Symbol was breaking the library in IE8, so it has been removed. (The Symbol code was used to make the Node.js REPL default to displaying the string value of a BigNumber.)

This is a minor amendment that did not require any changes to the existing documentation, but strictly-speaking it is a breaking change so annoyingly I have had to increment the major version number.

Changelog

• Add toJSON and decimalPlaces methods.