renumber difficulty: 1=Easy, 2=Hard

[FreeShisen] / res / values / arrays.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="sizes">
        <item>Small</item>
        <item>Medium</item>
        <item>Large</item>
    </string-array>
    <string-array name="difficulties">
        <item>Easy</item>
        <item>Hard</item>
    </string-array>
    <string-array name="difficulty_values">
        <item>1</item>
        <item>2</item>
    </string-array>
    <string-array name="size_values">
        <item>1</item>
        <item>2</item>
        <item>3</item>
    </string-array>
</resources>