WIP: untested, pass-thru items with type

When piping data to our storage backend, allow any "entry" item with a
"type" field.  If it does not have a type field, validate per usual
using sgvdata.
Merge branch 'dev' into wip/rest/mbg
require date instead of sgv
Merge pull request #189 from nightscout/wip/rest/mbg

Allow non-SGV entries to be posted to the rest API
abstract predictAR lookback and make it adjustable
fix parentheses to keep code unchanged when lookback=1
predictAR bug fixes
lookbackTime = FORTY_TWO_MINS when lookback=1
change predictAR lookback from 1 to 2 (5m to 10m)
attempt to prevent pebble to only read SGV values

Try to avoid reporting null for pebble by only considering SGV
records.

Many thanks to @elute for raising flags on this.
fix mmol panning to show mmol

Fixes a bug where panning would show "HIGH".
attempt to prevent pebble to only read SGV values

Try to avoid reporting null for pebble by only considering SGV
records.

Many thanks to @elute for raising flags on this.
Merge pull request #183 from asidorovich/master

Option to switch between 12 and 24 hours time format
Merge branch 'dev' into wip/predictARLookback
Merge branch 'dev' into wip/predictARLookback
Merge pull request #194 from nightscout/wip/predictARLookback

predictAR lookback abstraction
give mbg's an outline to make them more distinct
when a recent MBG is received via the api and pushover is configured send a notification
a simple script to post an MBG
changed offset to 10 minues; store/check lastMBG time to prevent sending dupes