2.6.4 rel notes update
DOCS-3882 added 2.6.4 changes
DOCS-3882 match 2.6.4 changes with release announcement
DOCS-3882 added 2.6.4 changes
DOCS-3403 - harmonize action-resource mappings

Signed-off-by: Sam Kleinman <samk@10gen.com>
add version for rs.printReplicationInfo methods
DOCS-1362, removing references to necessity of disabling profiling before using db.fsyncLock()

Signed-off-by: kay <kay.kim@10gen.com>