updating sharding instructions to shard patient_cahce on _id instead of value.medical_record_id.  There seems to be an issue with sharding and outputting map reduce jobs into a sharded collection that is sharded by anything but _id
Merge branch 'update_sharding_instructions'

Rebasing and merging #139
Added toggle for circle visuals and styled alternate output. 

Default is to have the circles.
Updated preference name to should_display_circle_visual
Merge pull request #144 from pophealth/toggleCircle

Add toggle for circle visuals and style alternate output.
format numerator/denominator numbers in results dashboard

e.g., 3,025 -> 3k, 4,598,445 -> 5m, small numbers stay the same
add test for fraction abbreviation
increase precision in numeral abbreviations to single decimal

e.g., 7203 -> 7.2k, 8389845 -> 8.4m
Making sure that small integers do not show a decimal place.

Previously, a number like '1' would display as '1.0'