DOC: Added docstring for MpiCommandLine with example usage.
DOC: Added docstring for MpiCommandLine with example usage.

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