Update database-references.txt

Add some missing comas.

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1633: modifing filter data for sphinx domain to avoid overprinting prefixes
minor: fixing dependency
minor: revising index limt
minor: fixing newline issue
DOCS-1644: inital fixes for mongofiles page
DOCS-1644: edits to the mongofiles page
BUMP 2.2.5
minor: improving tags generation
DOCS-1526: updating ordering of capped collections page.
minor: updating descriptions of links on index page
DOCS-1669: adding note about ordering of group output.
build: minor adding json output work
minor: correcting lanaguage
minor: build json output
Update examples-map-reduce.rst

I change the price value in order to match up with the items qty and price values.

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1611: fixing wording of TTL collection description
DOCS-1561: adding clarification about automatic generation of object ids.
build: reorganizing bootstrapping
DOCS-1199 Fix incorrect title in 2.2 release notes