a drop "column" example using $unset
minor: fixing rst problem
merge: @danilobellini changes to sql to mongodb examples table
Merge branch 'master' of git://github.com/danilobellini/docs-mongodb
DOCS-1314 remove reference to --rest option for mongos

Signed-off-by: Sam Kleinman <samk@10gen.com>
Fixed typo (comma to period).

Fixed typo where a comma was used instead of a period.

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor: removing text search from sidebar
structural: moving ObjectId page.
minor: cleaning up crud page.
structural: moving gridfs
structure: splitting administration/indexes documents into tutorials