EDIT

fix #8807 adaptive headers in description table

ref #8771 fixing bug in statistical value processing

ref #8686 removing fragment from link

ref #8771 finetuning of statistical values display and more tests

ref #8771 unit test for significant figures of statistical values

fixing PHPUnit setup for php 7 and documenting its usage with PHPStorm

fix #8771 removing comment

fix #8771 display of average value with minimum amount of significant figures

ref #8786 renaming all min_max_() functions to statistical_values_()

ref #8739 updated explanatory text for statistical values