updated readme with published paper link

Readme.md

 # Analysis for a short paper on statistical power & statistical significance
 
-And the various confusions that arise...
+And the various confusions that arise... Inspired by our experiences on the [SAVE](https://save-project.co.uk/) project.
 
- * Latest draft: 
-   * [.Rmd](https://git.soton.ac.uk/ba1e12/weGotThePower/blob/master/paper/weGotThePower.Rmd) code (mostly stats & notes, little text)
-   * [.html](https://git.soton.ac.uk/ba1e12/weGotThePower/blob/master/docs/weGotThePower.html) output (as above)
+ * Now published as: Ben Anderson, Tom Rushby, Abubakr Bahaj & Patrick James (2019) [Ensuring statistics have power: Guidance for designing, reporting and acting on electricity demand reduction and behaviour change programs](https://doi.org/10.1016/j.erss.2019.101260)
 
 Structured as an [R package](http://r-pkgs.had.co.nz/) for re-producability.