ademant/minetest_xpfw: Add Framework for Managing different Kind of experience, e.g. farming experience for getting faster crops as more farming you have done.

A. Demant 1839396c82 some textures; errors		5 years ago
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Cause-Of-Death.svg	1839396c82 some textures; errors	5 years ago
WorkingTheLand.svg	1839396c82 some textures; errors	5 years ago
airchuck88-hiker.svg	1839396c82 some textures; errors	5 years ago
coal-mine.svg	1839396c82 some textures; errors	5 years ago