v2.7.1

1.Minor bug fixes and improvements
2.Added algo to config.ranks[].daily_bonus.streak_type - A generic algorithm making the growth rate of the reward decreases as streak increases, solving the issue of percentage that leads to ultra high reward when streak is high.
When streak_type is algo, there's a algo_offset property. It must be a positive number. The smaller it is, the higher the growth rate is when streak is small. Also, it's recommended to set streak_value around 1, the larger it is, the higher the growth rate is.