Update v1.2

Changelog :

- Changed the main menu

- Reworked the loading screen to show what is being loaded

- The focus tree looks different now

- Fixed long loading time

- Reworked the entire GUI

- Reworked the AI

- Reworked diplomacy

   - Added diplomatic power (DP), that will allow the player to make diplomatic descisions

   - You can now seize provinces from vassals

   - The AI should stop declaring war at random

   - You can now form federations

   - The AI won't accept any peace deals now

   - You can't declare war for no reason anymore 

Unique focus tree for :

- France

- United Kingdom

- Germany

- Russia