exec results should display raw output, not scientific notation, by default #46

Currently large numbers are displayed in scientific notation

rai -q exec mydb -e myeng -c "def output = count[undirected_trust_graph]" 
/:output/Int64
5.4003578e+07

I think it would be more appropriate to display raw data, perhaps with an option to for other formats. Here's what I would want to see in this case:

rai -q exec mydb -e myeng -c "def output = count[undirected_trust_graph]" 
/:output/Int64
54003578