July 9th Updates

Updates:

- Added more materials to confine the game loop: manure, compost, biomethane.

- Roosters can boost the egg production but the egg production requires at least 1 hen.

- Added tooltips for corn, egg, manure, compost, and biomethane.

- Finished the fundamental game loop.

To-do list:

- Add tooltips for buttons

- Balance the economics

- Add a flow chart to explain the gameplay system

- The ending?