- Fixed issue with bulldozer sound not playing

- Added discord, Youtube and website link to main menu
- When playing game, cursor is now locked to game (doesn't go to second monitor). When in Main Menu, cursor can move freely to other screens.
- Fixed issue in Play offline button, with places, where it didn't react to player cursor
- Fuel stations are now clickable objects, displaying selection circle
- Refuel now costs money. For now all of the cars has 100 coins max refuel. Payment is calculated from this maxium.
- Added sound for refuel
- In HQ picking Phase, HQ stays under cursor and has red transparent color so it's obvious that You can't place it at that spot. It gets colored only on placable positions.
- In exclusive picking Phase, added alpha effect on mouse over buildings which are my exclusive buildings. This will help recognize that player can deselect building.
- Changed orange player color because it was too similar to yellow