Universal support

[kikonen]

Would be nice to have integration with http://left-pad.io/

[atipugin]

What do you mean?))

[kikonen]

Relying purely into logic in this gem may not be futureproof solution. Due to that might make sense to integrate core logic with established service. To allow full user control it could be made configurable, which core engine is used to make heavy lifting of calculations. This leaves also open future possibility of adding new engines for calculation, which would allow community to provide them as need arises.