Library without bcmath

[recursivetree]

This library is exactly what I'm looking for. Unfortunately, I can't use the bcmath extension in the environment I intend to use the plugin.

Is is possible to add support for running the library without bcmath?

[uestla]

I've intentionally rewritten the core calculations to use bcmath since it's the easiest way to have precise calculations. If you'd like to rewrite the bcmath to string operations using plain PHP, please send a PR :-)