Patch notes 0.3.1.

Patch Notes 0.3.1.

• Added counter to buildings to see their current life.
• Added a description of the troops in the cards in game.
• Change in typography to see more legible.
• Highlighted troops and important menus to be more intuitive.
• Added description for improvements when conquering a building.
• Fixed a serious bug that broke the sprites of the troops.
• Other small bug fixes.
• Other minor changes.