Simple SandBox 2 Update (v. 1.7.70)

- The atomic bomb in the WW2 pack explodes when hit by a weapon;
- Added a first aid kit;
- Added a new free tank;
- Added indexing of pages in the Map LeaderBoard;
- Fixed the friends system;
- Optimized textures of characters, weapon skins and models (by 90MB);
- Fixed bugs;
- Improved anti-cheat.