Display upgrades when auto picker becomes available

Addresses #20.
Display auto-picker upgrades as soon as the picker itself is available.
Add "hand picked" statistic

Addresses #30.
Adds a statistic to display how many mushrooms the player has hand picked.
Display upgrade level

Addresses #30.
Displays the upgrade levels in the statistics box.
Display mps factor

Addresses #30.
Displays the mps factor as a percentage.
Save hand picked mushrooms

Forgot to save this.
Display mushrooms per pick

Addresses #30.
Displays the number of mushrooms per pick statistic.
Display character statistics

Addresses #30.
Displays strength and dexterity in the statistics box.