document optional metadata for specs.
document optional metadata for specs.

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@1294 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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