0.6.3

[winedarksea]

0.6.3 🎐🎐🎐

• energy datasets to load_live_daily
• improved the 'Scalable' transformer_list to reduce memory issues on larger datasets
• memory improvements to KalmanSmoother, HolidayTransformer, LocalLinearTrend
• added DiffSmoother
• added force_gc arg which can be tried if memory is in short supply relative to data (probably won't help much)