added a ore-mineral composition text file

* what ores give what minerals along with their compositions.
* more minerals for a certain ore doesnt necesarily mean that you can
get more ingots from that ore, im going to implement something that
automagically calculate percentage chanced to make sure the average
ingots per ore is 6/8 (and configurable)
* there are also some other ores but those are native (the element
exists in its pure form not bonded in a compound) so i dont have them
listed