DOCS-1323 replica set names must be unique

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1999 fix sort syntax
DOCS-1152: Unclear how to use and aggregation operators

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor: fixing meta section
minor: updating meta content
DOCS-1731: Split manage chunks in sharded cluster tutorial page

Signed-off-by: kay <kay.kim@10gen.com>
DOCS-1323: text update
trivial fix- remove floating words
DOCS-1797: comment on manual/reference/aggregation/addToSet.txt

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1797: edits