ENH: Improved python 3 compatibility
ENH: Improved python 3 compatibility

carolFrohlich/nipype,pearsonlab/nipype,carolFrohlich/nipype,FCP-INDI/nipype,FCP-INDI/nipype,sgiavasis/nipype,pearsonlab/nipype,FCP-INDI/nipype,sgiavasis/nipype,mick-d/nipype,iglpdc/nipype,iglpdc/nipype,FCP-INDI/nipype,mick-d/nipype,iglpdc/nipype,dgellis90/nipype,dgellis90/nipype,pearsonlab/nipype,mick-d/nipype,dgellis90/nipype,pearsonlab/nipype,carolFrohlich/nipype,iglpdc/nipype,dgellis90/nipype,sgiavasis/nipype,mick-d/nipype,sgiavasis/nipype,carolFrohlich/nipype