Merge pull request #166 from mdijkstra/master

improved getStatistics script + added readme
Added meta documentation :-)
PCA.txt is now in every genotype delivery
Merge pull request #167 from RoanKanninga/master

PCA.txt is now in every genotype delivery
move part on doc to wiki
Merge branch 'master' of https://github.com/molgenis/molgenis-pipelines