DOCS-1492 command/group

Signed-off-by: schmalliso <allison.moore@10gen.com>
Signed-off-by: Sam Kleinman <samk@10gen.com>
fixing group method param to populate from command

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1492 aggregation/geoNear & command/geoNear

Signed-off-by: schmalliso <allison.moore@10gen.com>
Signed-off-by: Sam Kleinman <samk@10gen.com>
params: method/mapReduce command/mapReduce

Signed-off-by: Sam Kleinman <samk@10gen.com>