New graphism and more

Hi community,

During this week : 

 - Rework of the iceberg shader, added reflection, and a more realistic behaviour

 - Rework on the water shader, with reflection too (normals coming soon)

 - Added a splash VFX when the player falls in the ocean

 - Skybox change, and lighting rework

 - A lot of bugs fixed (multiplayer bugs at majority)

Sounds are coming soon and also a settings menu to configure graphics, sounds and keybinds. I will also remake the design of the menus.

I hope you'll enjoy this new content.

Pangauwin