This work was supported by the Marie Skłodowska-Curie Innovative Training Network (ITN) ClickGene (H2020-MSCA-ITN-2014-642023), http://www.clickgene.eu/, FP7 ERA Chairs program No. 621364 (TUTIC-Green) and the Irish Research Council Government of Ireland Postgraduate Scheme (GOIPG/2013/826).