Stat Names/Descriptions Re-Write #1

- Renamed all stats & edited descriptions
- Changed some group membership w/ KV stats - more to come

Change-Id: I6f4d9587e36c80ddc14191f43b185d8955570c04
Reviewed-on: http://review.couchbase.org/107318
Reviewed-by: Rob Ashcom <rob.ashcom@gmail.com>
Tested-by: Rob Ashcom <rob.ashcom@gmail.com>

Author: robashcom