Add support for reading snapshots for global reader
Add support for reading snapshots for global reader

plamut/ggrc-core,AleksNeStu/ggrc-core,AleksNeStu/ggrc-core,plamut/ggrc-core,AleksNeStu/ggrc-core,selahssea/ggrc-core,VinnieJohns/ggrc-core,VinnieJohns/ggrc-core,VinnieJohns/ggrc-core,selahssea/ggrc-core,selahssea/ggrc-core,VinnieJohns/ggrc-core,plamut/ggrc-core,selahssea/ggrc-core,plamut/ggrc-core,AleksNeStu/ggrc-core