Tradition now unlocks Banaue Rice Terraces

The consensus on the forums seems to be that unlocking the Great library
with Tradition is a poor choice and that Banaue Rice Terraces would be
better. I agree. Speadsheet also changed

http://forums.civfanatics.com/showthread.php?t=517804
Merge pull request #153 from skodkim/stable

Tradition now unlocks Banaue Rice Terraces