Alpha Feature Update v0.04.0

- Now every era lasts for 100 turns, and changed the UI to display the number of turns and the year is displayed under the turn.

- The symbol window design changed from grey box to transparent white background for better visibility.

- The symbols obtained by selecting government is mostly changed to reflect the real world better.

- Effect of some of the government has changed.

- New notification card has been added for new era.

- All informations in information popup box in main game window, inspiration window and government selection window has now been unified.