Remove aggregators
Fix io field for group/ungroup
Clean aggregator, fix syntax hilighters, and small things
Add io field for sum
Fix io field for ungroup
Remove results that are too long
Fix script to generate docs for the data explorer -- reset some flags
Fix io field for avg
Shuffle aggregations
Fix io field
Merge pull request #222 from rethinkdb/michel_group_polish_index

Michel group polish - Part 2