fixed inputs_help error if opt_map key was None, and updated grab_doc to raise IOError if software not installed
fixed inputs_help error if opt_map key was None, and updated grab_doc to raise IOError if software not installed

git-svn-id: 24f545668198cdd163a527378499f2123e59bf9f@654 ead46cd0-7350-4e37-8683-fc4c6f79bf00

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