Quick reformatting of usecases doc to try and reduce number of sphinx warnings.
Quick reformatting of usecases doc to try and reduce number of sphinx warnings.

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@464 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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