updated ExtractRoi() to handle output file given by user
updated ExtractRoi() to handle output file given by user

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@1056 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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