Update source/administration/production-notes.txt

update notes with NFS flags to let MongoDB work on a NFS drive.
DOCS-956 covered indexes and dot notation
DOCS-956 covered index and subdocument fields
DOCS-956 indexes that cover queries
DOCS-1055 snmp
DOCS-1055 snmp edits
Update source/tutorial/write-a-tumblelog-application-with-django-mongodb-engine.txt

Error in urls.py
Fix misprints
Update source/administration/operational-segregation.txt
Update source/core/sharded-clusters.txt
Update source/reference/replica-configuration.txt
merge: typo correction
merge: minor correction
c/map/reduce
fix: rst for include directive
wiki migration cleanup: change references from :wiki: to correct links
Fix links & sphinx command
minor cleanup
DOCS-1110 typo
DOCS-941 replication chaining