Nerf lux tool durability.

3x the uses of lode was way too much.  1.5x before needing a
recharge sounds a little better.

mods/nc_lux/tools.lua

@@ -26,6 +26,7 @@ for _, shape in pairs({'mallet', 'spade', 'hatchet', 'pick', 'mattock'}) do
 		for k, v in pairs(orig.tool_capabilities.opts) do
 			tc[k] = v + 1
 		end
+		tc.uses = 0.5
 		def.tool_capabilities = nodecore.toolcaps(tc)
 
 		def.name = modname .. ":tool_" .. shape .. "_" .. temper