Base files for new epi interfaces
Base files for new epi interfaces

Added base classes for interfaces fsl_prepare_fieldmap, topup and applytopup

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