NSfollow: work with data sources that do not provide raw data

IdempotentMigrations: fix import

InPen: improve new pen sequence

DailyIntentService: convert to Job

CollectionServiceStarter: rework for Oreo

Home: sync changes for NSfollow

WebServices: add sensor and collector status options to sgv.json

Merge branch 'master' of https://github.com/NightscoutFoundation/xDrip …

…into jamorhamvoice

Calibration: allow NativeCalibrationPipe when not auto calibrating

Gradle: add targetSdkVersion to buildConfig