This is an implementation of the paper: Squinting at Power Series. based on:
https://golang.org/test/chan/powser1.go
https://github.com/elkorn/golang-playground/tree/master/powerSeries
https://github.com/jessehzj/golang-playground/tree/master/powerSeries2
The basic power series calculator
power seires calculator with demand channel
implemented reversion and arctan based on the library:powser1.go