Tetra Stats 1.6.1: Tetra League Season 1 end is near

Changes from 1.6.0:

• Added RD indicator, that shows if it's safe to drop Tetra League and if it's not - shows RD, required for it.
• Fixed "Get Tetra League matches history" function, since p1nkl0bst3r modified data format.
• Small UI changes