oneTailed or TwoTailed test as attribute instead of type
testDirection -> alternativeHypothesis
Merge pull request #81 from cmaumet/inferenceTail

Inference and testDirection attribute instead of Inference(One|Two)Tailed [ following the Hackathon ]
Merge branch 'master' into rf/folders

* master:
  testDirection -> alternativeHypothesis
  oneTailed or TwoTailed test as attribute instead of type
rf: move tests into nidm-results
add: update readmes script to nidm-results