Fix subreddit traffic stats

[libertysoft3]

https://saidit.net/s/help/comments/5dw3/traffic_page_isnt_operational/

the codebase currently collects traffic data fine, but the final stats and reports are generated by sending all of the data to Amazon EMR/Elastic Map Reduce.

saidit needs to factor out the amazon/external service dependency or run it locally somehow.