introduce mqtt

Introduce basic mqtt.
lint records first
Merge remote-tracking branch 'origin/develop' into wip/mqtt/init
intial IOB experiments
Initial port of DIYPS IOB and insulin activity formulas
the most basic copy and paste profile api possible
Merge branch 'wip/iob-cob' of github.com:nightscout/cgm-remote-monitor into wip/iob-cob
removing @jasoncalabrese's copy
Merge branch 'wip/iob-cob' of github.com:nightscout/cgm-remote-monitor into wip/iob-cob
forgot to git add some profile api files
Merge branch 'wip/iob-cob' of github.com:nightscout/cgm-remote-monitor into wip/iob-cob
no POSTs yet
pull sensitivity and DIA from profiles collection via API
Merge branch 'wip/iob-cob' of github.com:nightscout/cgm-remote-monitor into wip/iob-cob
Merge branch 'master' into wip/iob-cob
@danamlewis came up with some more intuitive labels
Added cob calculation
include rawIsig and friends
this writes rawBg to console, but doesn't display it
initial rawBg plot as white dot overlay