added example_data function for use with doctests based on suggestion by Nate Smith
added example_data function for use with doctests based on suggestion by Nate Smith

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@1848 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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