read BG thresholds and alarm types from ENV and make them available to the server and api
read BG thresholds from api; refactor init so that it happend after we get basic settings from api
emit alarms based on ENV ALARM_TYPES (simple and predict)
updated BG_HIGH default to 240
cleanup
preseve current behavior is new BG_* and ALARM_TYPES ENV isn't set

also some cleanup of the int ENV parsing
draw 2 extra lines for the high/low thresholds; dispay normal alarms as yellow and urgent as red; some clean up
changed default of BG_HIGH to 260
some more display adjustments for short-landscape mode
Merge branch 'wip/jingle-bells' of github.com:nightscout/cgm-remote-monitor into wip/push-notify
use new BG thresholds instead of hardcoded BGs
Merge branch 'wip/push-notify' into prod