v2.0.2

• improve the way of creating instance of an e-mail message fa28134
• ability to select a white color for RGB channel in schedules #93 (update of supla-scheduler required)
• fix rare double executions of a sunset-based schedules #78
• calculate interval schedule executions relative to the start time #80
  This change allows to set executions on any time slots, not limited to cron-based executions; for example 10-minutes interval can be now launched on 12:00, 12:10, 12:20 but also on 12:05, 12:15, 12:25 and so on.
  Moreover, the maximum interval limit has been enlarged from 30 to 300 minutes.
• prevent caching of JSON responses #91
• do not calculate schedule executions for past dates #82
• fix webpack chunks URL generation for production 3db5628