Update Travis to look for ERROR in R CMD check call
Update Travis to look for ERROR in R CMD check call

nsh87/receptormarker,catterbu/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,daniel0128/receptormarker,nsh87/receptormarker,daniel0128/receptormarker,catterbu/receptormarker,catterbu/receptormarker,nsh87/receptormarker,nsh87/receptormarker,daniel0128/receptormarker,nsh87/receptormarker,catterbu/receptormarker,catterbu/receptormarker