Balancing update

In this update, four new features have been implemented:

1. As long as you give your people enough food to feed the current population, you will get some migrants. You can also give more than enough food to encourage population growth. It calculates population as food divided by twenty, plus small number of migrants.
2. Score now takes into effect how much grain you have at the end plus total number of people who starved in this game.
3. Your reign is a random number of years, between 12 and 25.
4. The current score is always shown in the sidebar.

Those will probably be the last update for a while, as I'm wanting to start a new project in Twine.