Merge pull request #113 from Bonder-MJ/master

Fix in error in printing QTL effects.
Impute2 reader now gives error when file is not correctly formated
Merge branch 'master' of https://github.com/molgenis/systemsgenetics.git
Fixed bug in manual closes #115
Merge pull request #116 from PatrickDeelen/master

Impute2 reader now gives error when file is not correctly formated + fix bug in readme
Merge branch 'master' of https://github.com/molgenis/systemsgenetics