Changes

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<ref name="geologistexp">See <tt>GameLocation::breakStone</tt> in the game code.</ref>

<ref name="geologistexp">See <tt>GameLocation::breakStone</tt> in the game code.</ref>

<ref name="coalbonus">There are 2 different code sections to assign coal to a rock outside the mine. One is breakStone, a 5% * (1+(.005*MiningSkill)) chance of a rock giving coal which does give the +5 bonus. The other is onStoneDestroyed, which is a 3.5% chance that doesn't give bonus XP. Prospector causes breakStone to roll twice for the coal drop, while it doubles the chances for onStoneDestroyed to 7%.</ref>

<ref name="coalbonus">There are 2 different code sections to assign coal to a rock outside the mine. One is breakStone, a 5% * (1+(.005*MiningSkill)) chance of a rock giving coal which does give the +5 bonus. The other is onStoneDestroyed, a 3.5% chance for coal that doesn't give bonus XP. From a player's view, the game will randomly give 6 XP sometimes for coal dropping rocks, and sometimes just 1 randomly. Prospector causes breakStone to roll twice for the coal drop, while it doubles the chances for onStoneDestroyed to 7%.</ref>

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