* traited a few more utility nodes * allowed merging in two different directions for merge node (hstack and vstack)
* traited a few more utility nodes
* allowed merging in two different directions for merge node (hstack and vstack)

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@1465 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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