beta 0.6.2.x update

Overlord: v.0.6.2.7 preview:

- Added new medium tanks: Т-54, Panther II, Pershing.
- Added new TD "Object" 704.
- Added new SPGs: "Object" 212, G-Tiger, G-Panther, M12, M40/M43.

- Increased reverse speed for tier 7, 8, 9 medium tanks.
- Rebalanced characteristics for all guns and ammo for current SPGs tiers 3, 4, 5, 6.
- Increased hit points for tier 7, 8, 9 medium tanks.
- Increased the visibility for tier 8, 9, 10 heavy tanks by 25% during movement and at rest

- Reworked match-making system.
- Fixed bug with not saving status of ammo-resupply checkbox.
- Fixed incorrect messages on recieving achievements in service channel.
- "Not ready" button now unlocked for platoon leader in waiting line before battle.
- Corrected unobvious descriptions of new achievements.

Topic for discussion

Attention! the list of changes is not full.