Added Cocoa and Mana Beans to Farmer

Added Cocoa Farmer
Added Mana Bean Farmer
Mana bean farm config option to turn off
also fixed some typos
Farmer was merging beans with different aspects because they are only
differentiated by NBT, overwrote getNumCanMerge to fix that in
TileFarmStation as it seems unnecessary in other machines and would
increase overhead for no appreciable gain
Merge pull request #1513 from hilburn/master

Added Cocoa and Mana Bean farmers