DOCS-1150 editing note about $query operator
minor: whitespace and paragraph changes
DOCS-854 adding a note about stale lock files in snapshots
DOCS-635: not about chunk ranges inclusive/exclusiveness.
DOCS-1017: server status helpers
refactor: ensureIndex documentation
minor: formating correction
DOCS-1148 fixing stale links
DOCS-1151: correction to $within and operation
DOCS-981 v8 change impact

DOCS-981 incorporate aaron's comments

DOCS-981 call out db specifically as no longer available in map-reduce and where

DOCS-981 V8 changes - incorporate sam's comments

DOCS-981 V8 release notes

DOCS-981 V8 release notes
DOCS-854: correction about snapshot behavior
merge: DOCS-981
DOCS-981: edits
fixing error message editing problem