Added base of runes mod

- Added rune API's first implementation
 - Added basic cubic runes in solarmana

mods/runes/init.lua

@@ -0,0 +1,15 @@
+-- Rune mod by Mg
+-- License GPLv3
+
+local modpath = minetest.get_modpath("runes")
+
+-- API first
+dofile(modpath.."/api.lua")
+
+-- Then the rune themselves
+dofile(modpath.."/registration.lua")
+
+-- And the handlers
+dofile(modpath.."/handlers.lua")
+
+minetest.log("action","[runes] Mod loaded")