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		6 tahun lalu
..
src	1839396c82 some textures; errors	6 tahun lalu
xpfw_death.png	1839396c82 some textures; errors	6 tahun lalu
xpfw_farming.png	1839396c82 some textures; errors	6 tahun lalu
xpfw_hiking.png	1839396c82 some textures; errors	6 tahun lalu
xpfw_miner.png	1839396c82 some textures; errors	6 tahun lalu