Sync with indev branch, bump version to 0.4.7

RealBadAngel

2013-06-30 8e03d7ded6441b26e9d44102c0cd2ee39f9e90bc

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-- Minetest 0.4.6 : technic_worldgen
 
modpath=minetest.get_modpath("technic_worldgen")
 
dofile(modpath.."/nodes.lua")
dofile(modpath.."/oregen.lua")
dofile(modpath.."/crafts.lua")