BF: updated datagrabber to use infields only when available
BF: updated datagrabber to use infields only when available

dmordom/nipype,carolFrohlich/nipype,fprados/nipype,Leoniela/nipype,glatard/nipype,christianbrodbeck/nipype,blakedewey/nipype,wanderine/nipype,FredLoney/nipype,FredLoney/nipype,mick-d/nipype_source,arokem/nipype,arokem/nipype,iglpdc/nipype,blakedewey/nipype,iglpdc/nipype,carolFrohlich/nipype,grlee77/nipype,grlee77/nipype,pearsonlab/nipype,dgellis90/nipype,gerddie/nipype,arokem/nipype,glatard/nipype,dmordom/nipype,blakedewey/nipype,grlee77/nipype,sgiavasis/nipype,sgiavasis/nipype,iglpdc/nipype,FCP-INDI/nipype,JohnGriffiths/nipype,dmordom/nipype,gerddie/nipype,Leoniela/nipype,FCP-INDI/nipype,pearsonlab/nipype,blakedewey/nipype,iglpdc/nipype,wanderine/nipype,mick-d/nipype,mick-d/nipype,mick-d/nipype_source,rameshvs/nipype,carlohamalainen/nipype,dgellis90/nipype,sgiavasis/nipype,FCP-INDI/nipype,gerddie/nipype,Leoniela/nipype,JohnGriffiths/nipype,JohnGriffiths/nipype,carlohamalainen/nipype,dgellis90/nipype,carolFrohlich/nipype,gerddie/nipype,mick-d/nipype,JohnGriffiths/nipype,rameshvs/nipype,dgellis90/nipype,rameshvs/nipype,glatard/nipype,christianbrodbeck/nipype,mick-d/nipype_source,FredLoney/nipype,arokem/nipype,wanderine/nipype,pearsonlab/nipype,fprados/nipype,FCP-INDI/nipype,carlohamalainen/nipype,fprados/nipype,pearsonlab/nipype,mick-d/nipype,grlee77/nipype,sgiavasis/nipype,glatard/nipype,rameshvs/nipype,carolFrohlich/nipype,wanderine/nipype