minor: correcting logic
minor: fixing build errors
DOCS-1198 add the where,mapreduce, group restrictions in 2.4 release notes to the actual where, mapreduce and group manual pages as well

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1022 sort heterogeneous type -- need to backport

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-968 within operation in agg match