added code that checks for nulls in data sets header or footer (in case wrong props file is used)
added code that checks for nulls in data sets header or footer (in case wrong props file is used)

holtgrewe/cbioportal,n1zea144/cbioportal,jjgao/cbioportal,holtgrewe/cbioportal,d3b-center/pedcbioportal,n1zea144/cbioportal,bengusty/cbioportal,bihealth/cbioportal,jjgao/cbioportal,d3b-center/pedcbioportal,d3b-center/pedcbioportal,HectorWon/cbioportal,mandawilson/cbioportal,fcriscuo/cbioportal,fcriscuo/cbioportal,shrumit/cbioportal-gsoc-final,gsun83/cbioportal,istemi-bahceci/cbioportal,d3b-center/pedcbioportal,istemi-bahceci/cbioportal,cBioPortal/cbioportal,zhx828/cbioportal,bengusty/cbioportal,bihealth/cbioportal,j-hudecek/cbioportal,zhx828/cbioportal,adamabeshouse/cbioportal,bihealth/cbioportal,bihealth/cbioportal,zheins/cbioportal,holtgrewe/cbioportal,inodb/cbioportal,inodb/cbioportal,cBioPortal/cbioportal,n1zea144/cbioportal,HectorWon/cbioportal,fcriscuo/cbioportal,kalletlak/cbioportal,n1zea144/cbioportal,shrumit/cbioportal-gsoc-final,mandawilson/cbioportal,sheridancbio/cbioportal,fcriscuo/cbioportal,inodb/cbioportal,kalletlak/cbioportal,zhx828/cbioportal,j-hudecek/cbioportal,xmao/cbioportal,leedonghn4/cbioportal,xmao/cbioportal,angelicaochoa/cbioportal,mandawilson/cbioportal,shrumit/cbioportal-gsoc-final,d3b-center/pedcbioportal,j-hudecek/cbioportal,pughlab/cbioportal,yichaoS/cbioportal,holtgrewe/cbioportal,xmao/cbioportal,leedonghn4/cbio-portal-webgl,j-hudecek/cbioportal,inodb/cbioportal,zhx828/cbioportal,leedonghn4/cbio-portal-webgl,n1zea144/cbioportal,leedonghn4/cbio-portal-webgl,bihealth/cbioportal,leedonghn4/cbioportal,istemi-bahceci/cbioportal,holtgrewe/cbioportal,jjgao/cbioportal,bihealth/cbioportal,leedonghn4/cbio-portal-webgl,istemi-bahceci/cbioportal,cBioPortal/cbioportal,inodb/cbioportal,inodb/cbioportal,kalletlak/cbioportal,gsun83/cbioportal,HectorWon/cbioportal,jjgao/cbioportal,holtgrewe/cbioportal,yichaoS/cbioportal,pughlab/cbioportal,pughlab/cbioportal,cBioPortal/cbioportal,gsun83/cbioportal,onursumer/cbioportal,gsun83/cbioportal,jjgao/cbioportal,leedonghn4/cbioportal,onursumer/cbioportal,d3b-center/pedcbioportal,leedonghn4/cbio-portal-webgl,cBioPortal/cbioportal,mandawilson/cbioportal,HectorWon/cbioportal,n1zea144/cbioportal,IntersectAustralia/cbioportal,jjgao/cbioportal,IntersectAustralia/cbioportal,shrumit/cbioportal-gsoc-final,adamabeshouse/cbioportal,cBioPortal/cbioportal,yichaoS/cbioportal,onursumer/cbioportal,mandawilson/cbioportal,zhx828/cbioportal,angelicaochoa/cbioportal,leedonghn4/cbioportal,j-hudecek/cbioportal,sheridancbio/cbioportal,xmao/cbioportal,shrumit/cbioportal-gsoc-final,zheins/cbioportal,mandawilson/cbioportal,gsun83/cbioportal,IntersectAustralia/cbioportal,kalletlak/cbioportal,IntersectAustralia/cbioportal,zheins/cbioportal,IntersectAustralia/cbioportal,sheridancbio/cbioportal,sheridancbio/cbioportal,gsun83/cbioportal,bengusty/cbioportal,d3b-center/pedcbioportal,pughlab/cbioportal,leedonghn4/cbioportal,zhx828/cbioportal,bihealth/cbioportal,zheins/cbioportal,fcriscuo/cbioportal,bengusty/cbioportal,IntersectAustralia/cbioportal,istemi-bahceci/cbioportal,leedonghn4/cbio-portal-webgl,zhx828/cbioportal,mandawilson/cbioportal,shrumit/cbioportal-gsoc-final,onursumer/cbioportal,kalletlak/cbioportal,angelicaochoa/cbioportal,j-hudecek/cbioportal,jjgao/cbioportal,kalletlak/cbioportal,adamabeshouse/cbioportal,fcriscuo/cbioportal,adamabeshouse/cbioportal,angelicaochoa/cbioportal,istemi-bahceci/cbioportal,adamabeshouse/cbioportal,pughlab/cbioportal,bengusty/cbioportal,kalletlak/cbioportal,HectorWon/cbioportal,leedonghn4/cbioportal,angelicaochoa/cbioportal,yichaoS/cbioportal,adamabeshouse/cbioportal,sheridancbio/cbioportal,sheridancbio/cbioportal,yichaoS/cbioportal,angelicaochoa/cbioportal,bengusty/cbioportal,yichaoS/cbioportal,HectorWon/cbioportal,angelicaochoa/cbioportal,pughlab/cbioportal,gsun83/cbioportal,xmao/cbioportal,inodb/cbioportal,shrumit/cbioportal-gsoc-final,zheins/cbioportal,zheins/cbioportal,adamabeshouse/cbioportal,IntersectAustralia/cbioportal,onursumer/cbioportal,pughlab/cbioportal,onursumer/cbioportal,xmao/cbioportal,yichaoS/cbioportal,n1zea144/cbioportal