Update 2Grp to R4.0

Update 2Grp to R4.0 for use with bfabricShiny. Testted with bfabricShiny application.

Restyling of 2 Grp Analysis

Restyle2Grp

fix naming problem

Reports as vignettes

version up

conditionalMarkdown

introducing conditional markup for 2grp report.

draft of 2 grp analysis

Includes test data. How to run in look into /samples/grp2analysisTest.R