Further clarifying project status in the README

Merge pull request #12 from Rican7/bugfix/attempt-number-accuracy

Bugfix - Attempt Number Accuracy

Finally making this package a Go module

Fixes #7 and closes #8.

Co-authored-by: Cody Jones <cody.dw.jones@gmail.com>

Initial release (pre-stable) of https://github.com/Rican7/retry