Add automatic lowercasing of all GeoJSON keywords

This makes it easier to match against later on.
Add tweet aggregation for metrics usage
Refactor admin panel to use Mongo aggregation collection
Refactor suggestions to use Mongo
add default sort to tweets by period
[wip] pre-allocation aggregation
[wip] pre allocation scheduler
[wip] add metrics counting to saved tweets
fu?
backfill add shortDate
fu scheduler don't get non-inserts as inserts
traccino fu - deep clone the doc so values aren't overridden
use $set on update, note query (put this before backfll fu)
backfill fu - dont reset $set obj
backfill date put on $set
backfll fu date on $set
update metrics controller to match
use aggregate methods for counting tag counts
update tags controller to use aggregate retval
prevent resetting of totals when preallocating an existing document