Add ghast eggs to the mad scientist lab

Add "ghasts" to the mad scientist factory:

<pre><code>4 Ghast Eggs for 8 Ghast Tears, 64 Fire Charges, 4 Dispensers, 256 White Carpets, 4 Furnaces, 256 Charcoal, 4 Villager Eggs</code></pre>

Hot air balloon :)