Support fetching all keys to a binary file.
Support fetching all keys to a binary file.

Added ability to specify stores on command line.

bitti/voldemort,rickbw/voldemort,FelixGV/voldemort,squarY/voldemort,bitti/voldemort,gnb/voldemort,bitti/voldemort,cshaxu/voldemort,LeoYao/voldemort,jeffpc/voldemort,HB-SI/voldemort,dallasmarlow/voldemort,arunthirupathi/voldemort,bitti/voldemort,HB-SI/voldemort,null-exception/voldemort,LeoYao/voldemort,bitti/voldemort,bhasudha/voldemort,jeffpc/voldemort,squarY/voldemort,arunthirupathi/voldemort,mabh/voldemort,bitti/voldemort,birendraa/voldemort,cshaxu/voldemort,jalkjaer/voldemort,arunthirupathi/voldemort,squarY/voldemort,birendraa/voldemort,bhasudha/voldemort,voldemort/voldemort,FelixGV/voldemort,jwlent55/voldemort,voldemort/voldemort,LeoYao/voldemort,birendraa/voldemort,arunthirupathi/voldemort,FelixGV/voldemort,arunthirupathi/voldemort,jwlent55/voldemort,mabh/voldemort,null-exception/voldemort,FelixGV/voldemort,FelixGV/voldemort,LeoYao/voldemort,gnb/voldemort,rickbw/voldemort,PratikDeshpande/voldemort,PratikDeshpande/voldemort,jwlent55/voldemort,HB-SI/voldemort,medallia/voldemort,jalkjaer/voldemort,HB-SI/voldemort,FelixGV/voldemort,bhasudha/voldemort,jwlent55/voldemort,FelixGV/voldemort,PratikDeshpande/voldemort,stotch/voldemort,jwlent55/voldemort,LeoYao/voldemort,mabh/voldemort,stotch/voldemort,LeoYao/voldemort,dallasmarlow/voldemort,squarY/voldemort,birendraa/voldemort,jeffpc/voldemort,HB-SI/voldemort,jalkjaer/voldemort,bitti/voldemort,voldemort/voldemort,gnb/voldemort,PratikDeshpande/voldemort,squarY/voldemort,PratikDeshpande/voldemort,rickbw/voldemort,arunthirupathi/voldemort,jeffpc/voldemort,bhasudha/voldemort,stotch/voldemort,squarY/voldemort,cshaxu/voldemort,stotch/voldemort,jalkjaer/voldemort,medallia/voldemort,cshaxu/voldemort,squarY/voldemort,mabh/voldemort,bhasudha/voldemort,gnb/voldemort,jeffpc/voldemort,null-exception/voldemort,jwlent55/voldemort,dallasmarlow/voldemort,HB-SI/voldemort,jalkjaer/voldemort,jalkjaer/voldemort,jalkjaer/voldemort,bhasudha/voldemort,birendraa/voldemort,medallia/voldemort,rickbw/voldemort,voldemort/voldemort,voldemort/voldemort,PratikDeshpande/voldemort,rickbw/voldemort,null-exception/voldemort,medallia/voldemort,voldemort/voldemort,medallia/voldemort,voldemort/voldemort,jeffpc/voldemort,stotch/voldemort,null-exception/voldemort,gnb/voldemort,dallasmarlow/voldemort,null-exception/voldemort,dallasmarlow/voldemort,rickbw/voldemort,cshaxu/voldemort,stotch/voldemort,arunthirupathi/voldemort,birendraa/voldemort,gnb/voldemort,mabh/voldemort,mabh/voldemort,cshaxu/voldemort,dallasmarlow/voldemort,medallia/voldemort