ROOTR: updated ROOTR Users Guide.md with DataFrame section
ROOTR: updated ROOTR Users Guide.md with DataFrame section

Duraznos/root,mhuwiler/rootauto,arch1tect0r/root,buuck/root,veprbl/root,abhinavmoudgil95/root,sbinet/cxx-root,arch1tect0r/root,sbinet/cxx-root,vukasinmilosevic/root,sirinath/root,beniz/root,mhuwiler/rootauto,gbitzes/root,gbitzes/root,davidlt/root,vukasinmilosevic/root,BerserkerTroll/root,evgeny-boger/root,lgiommi/root,abhinavmoudgil95/root,thomaskeck/root,zzxuanyuan/root,dfunke/root,arch1tect0r/root,sawenzel/root,beniz/root,georgtroska/root,Duraznos/root,omazapa/root,Duraznos/root,bbockelm/root,evgeny-boger/root,zzxuanyuan/root-compressor-dummy,arch1tect0r/root,sawenzel/root,evgeny-boger/root,nilqed/root,krafczyk/root,bbockelm/root,sawenzel/root,mattkretz/root,gganis/root,zzxuanyuan/root,georgtroska/root,zzxuanyuan/root-compressor-dummy,davidlt/root,thomaskeck/root,davidlt/root,mattkretz/root,mhuwiler/rootauto,vukasinmilosevic/root,simonpf/root,veprbl/root,root-mirror/root,arch1tect0r/root,satyarth934/root,CristinaCristescu/root,BerserkerTroll/root,root-mirror/root,gbitzes/root,georgtroska/root,veprbl/root,jrtomps/root,esakellari/root,mattkretz/root,Duraznos/root,thomaskeck/root,lgiommi/root,Y--/root,olifre/root,krafczyk/root,veprbl/root,vukasinmilosevic/root,thomaskeck/root,olifre/root,thomaskeck/root,sawenzel/root,gganis/root,Y--/root,arch1tect0r/root,abhinavmoudgil95/root,karies/root,arch1tect0r/root,arch1tect0r/root,omazapa/root,zzxuanyuan/root-compressor-dummy,simonpf/root,gbitzes/root,davidlt/root,simonpf/root,root-mirror/root,zzxuanyuan/root,georgtroska/root,gganis/root,olifre/root,bbockelm/root,nilqed/root,perovic/root,thomaskeck/root,jrtomps/root,evgeny-boger/root,zzxuanyuan/root,dfunke/root,buuck/root,krafczyk/root,krafczyk/root,omazapa/root,dfunke/root,gbitzes/root,davidlt/root,karies/root,gganis/root,olifre/root,simonpf/root,beniz/root,mkret2/root,Duraznos/root,davidlt/root,vukasinmilosevic/root,olifre/root,abhinavmoudgil95/root,zzxuanyuan/root-compressor-dummy,beniz/root,arch1tect0r/root,Duraznos/root,pspe/root,beniz/root,vukasinmilosevic/root,gganis/root,nilqed/root,veprbl/root,gganis/root,mhuwiler/rootauto,sirinath/root,abhinavmoudgil95/root,georgtroska/root,sbinet/cxx-root,mhuwiler/rootauto,CristinaCristescu/root,sawenzel/root,dfunke/root,zzxuanyuan/root,omazapa/root,buuck/root,sawenzel/root,evgeny-boger/root,sirinath/root,perovic/root,veprbl/root,mkret2/root,satyarth934/root,BerserkerTroll/root,bbockelm/root,beniz/root,jrtomps/root,lgiommi/root,simonpf/root,buuck/root,BerserkerTroll/root,mhuwiler/rootauto,lgiommi/root,zzxuanyuan/root,BerserkerTroll/root,bbockelm/root,sawenzel/root,zzxuanyuan/root-compressor-dummy,Duraznos/root,veprbl/root,zzxuanyuan/root-compressor-dummy,abhinavmoudgil95/root,karies/root,zzxuanyuan/root,dfunke/root,thomaskeck/root,sbinet/cxx-root,mhuwiler/rootauto,Y--/root,CristinaCristescu/root,gganis/root,pspe/root,nilqed/root,mhuwiler/rootauto,esakellari/root,vukasinmilosevic/root,georgtroska/root,Y--/root,sirinath/root,mattkretz/root,bbockelm/root,gbitzes/root,BerserkerTroll/root,zzxuanyuan/root-compressor-dummy,georgtroska/root,gganis/root,beniz/root,arch1tect0r/root,omazapa/root,Y--/root,lgiommi/root,perovic/root,mattkretz/root,perovic/root,abhinavmoudgil95/root,sbinet/cxx-root,beniz/root,evgeny-boger/root,CristinaCristescu/root,root-mirror/root,evgeny-boger/root,olifre/root,mkret2/root,mkret2/root,evgeny-boger/root,omazapa/root,satyarth934/root,mkret2/root,root-mirror/root,esakellari/root,nilqed/root,vukasinmilosevic/root,perovic/root,krafczyk/root,mattkretz/root,abhinavmoudgil95/root,satyarth934/root,thomaskeck/root,karies/root,mkret2/root,gbitzes/root,BerserkerTroll/root,buuck/root,simonpf/root,gganis/root,krafczyk/root,esakellari/root,mhuwiler/rootauto,pspe/root,mkret2/root,Duraznos/root,mkret2/root,krafczyk/root,CristinaCristescu/root,davidlt/root,evgeny-boger/root,karies/root,bbockelm/root,agarciamontoro/root,omazapa/root,zzxuanyuan/root-compressor-dummy,sirinath/root,satyarth934/root,simonpf/root,bbockelm/root,sirinath/root,mkret2/root,Duraznos/root,buuck/root,jrtomps/root,mattkretz/root,esakellari/root,gbitzes/root,agarciamontoro/root,jrtomps/root,sbinet/cxx-root,sbinet/cxx-root,CristinaCristescu/root,sawenzel/root,davidlt/root,abhinavmoudgil95/root,beniz/root,abhinavmoudgil95/root,jrtomps/root,olifre/root,thomaskeck/root,krafczyk/root,zzxuanyuan/root,root-mirror/root,buuck/root,sbinet/cxx-root,zzxuanyuan/root,perovic/root,mhuwiler/rootauto,vukasinmilosevic/root,sbinet/cxx-root,olifre/root,pspe/root,gbitzes/root,veprbl/root,karies/root,omazapa/root,perovic/root,zzxuanyuan/root-compressor-dummy,gganis/root,agarciamontoro/root,bbockelm/root,Y--/root,agarciamontoro/root,georgtroska/root,mhuwiler/rootauto,sirinath/root,georgtroska/root,agarciamontoro/root,gbitzes/root,jrtomps/root,dfunke/root,nilqed/root,CristinaCristescu/root,simonpf/root,krafczyk/root,pspe/root,perovic/root,evgeny-boger/root,vukasinmilosevic/root,esakellari/root,dfunke/root,jrtomps/root,mattkretz/root,mkret2/root,buuck/root,lgiommi/root,mattkretz/root,agarciamontoro/root,sirinath/root,satyarth934/root,veprbl/root,BerserkerTroll/root,evgeny-boger/root,satyarth934/root,nilqed/root,Y--/root,lgiommi/root,Y--/root,satyarth934/root,gbitzes/root,dfunke/root,satyarth934/root,root-mirror/root,olifre/root,veprbl/root,pspe/root,lgiommi/root,esakellari/root,esakellari/root,jrtomps/root,georgtroska/root,simonpf/root,buuck/root,satyarth934/root,nilqed/root,davidlt/root,Duraznos/root,sirinath/root,bbockelm/root,Y--/root,agarciamontoro/root,nilqed/root,nilqed/root,sirinath/root,simonpf/root,zzxuanyuan/root-compressor-dummy,CristinaCristescu/root,sawenzel/root,mattkretz/root,karies/root,sbinet/cxx-root,beniz/root,lgiommi/root,lgiommi/root,mattkretz/root,pspe/root,vukasinmilosevic/root,mkret2/root,agarciamontoro/root,CristinaCristescu/root,esakellari/root,olifre/root,jrtomps/root,krafczyk/root,jrtomps/root,pspe/root,davidlt/root,georgtroska/root,sirinath/root,root-mirror/root,zzxuanyuan/root,buuck/root,esakellari/root,thomaskeck/root,davidlt/root,abhinavmoudgil95/root,arch1tect0r/root,BerserkerTroll/root,perovic/root,sawenzel/root,Y--/root,root-mirror/root,olifre/root,karies/root,omazapa/root,bbockelm/root,lgiommi/root,omazapa/root,simonpf/root,Y--/root,karies/root,dfunke/root,zzxuanyuan/root,satyarth934/root,perovic/root,agarciamontoro/root,sbinet/cxx-root,pspe/root,buuck/root,karies/root,nilqed/root,krafczyk/root,esakellari/root,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root,dfunke/root,CristinaCristescu/root,veprbl/root,pspe/root,agarciamontoro/root,root-mirror/root,agarciamontoro/root,sawenzel/root,root-mirror/root,omazapa/root,BerserkerTroll/root,CristinaCristescu/root,gganis/root,BerserkerTroll/root,Duraznos/root,pspe/root,dfunke/root,beniz/root,perovic/root,karies/root