Merge pull request nightscout#715 from nightscout/prep2.8.2.1

2.8.2.1

2.6.2 version check

Merge pull request nightscout#255 from nightscout/2.8.2prep

2.8.2 release

Merge pull request nightscout#226 from nightscout/dev

2.8.1.1

Merge pull request nightscout#215 from nightscout/2.8.1prep

2.8.1 release

Merge pull request nightscout#147 from nightscout/2.8.0prep

2.8.0 release

Merge pull request nightscout#1 from nightscout/dev

2.7.0 release