only return the most recent treatment data via websockets; added opts to treatments.list()
Merge pull request #285 from jasoncalabrese/wip/iob-cob

Moved moved BG impact to delta line
Merge pull request #287 from nightscout/wip/treatment-filter#286

Reduce the amount a treatments sent via websockets to display on the chart for #286
Merge branch 'dev' into wip/iob-cob
get rid all the treatment slicing since we only return current data now