minor: corrections to aggregation reformat
readability+edits: replication processes

Before:
---
file: build/master/json/core/replication-process.json
source: source/core/replication-process.txt
stats:
   coleman-liau: 13.784545454545452
   flesch-ease: 27.759090909090958
   flesch-level: 12.510584415584418
   foggy:
      count: 8
      factor: 0.09090909090909091
      threshold: 3
   sentence-count: 7
   sentence-len-avg: 12
   smog-index: 9.236282656511921
   word-count: 88

After:
---
file: build/master/json/core/replication-process.json
source: source/core/replication-process.txt
stats:
   coleman-liau: 12.926666666666666
   flesch-ease: 29.36500000000001
   flesch-level: 11.64777777777778
   foggy:
      count: 9
      factor: 0.1
      threshold: 3
   sentence-count: 9
   sentence-len-avg: 10
   smog-index: 8.841846274778883
   word-count: 90
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>