Add check for invalid characters on character creation

Fixed typos in commands

Improve /tell command to allow writing to otcher character by character name or account name

Redirect /give command to match new permission system

Redirect /gamemode command

Improve commands descriptions

Improve regeneration loop: from now every player have own loop to regenerate health, mana and soul points

WorldProtect improvement:

• Fix bug with water and lava

• Locked physics for sand and gravel

• Locked painting destroying