Any chance of adding support for group by so we can perform aggregation

[cyl102]

Any chance of adding support for group by so we can perform aggregation using the odata data aggregation extension?

http://docs.oasis-open.org/odata/odata-data-aggregation-ext/v4.0/cs01/odata-data-aggregation-ext-v4.0-cs01.html

[galenp]

+1