Patch notes for version 0.13.1.0

Gameplay:
- Added new training equipment: Teqball Table.
- Added new training equipment: Tennis Net.
- Added new training equipment: Bastketball Hoop.
- Added new training equipment: Ring.
- Added Ctrl+Z and Ctrl+Shift+Z shortcuts for undo and redo training editor actions.
- Fixed training editor copy and paste to also copy custom equipment properties.
- Fixed replay floating wearable items.

Graphics:
- Considerable rendering performance improvements.
- Added new goal style: classic square net.