Add Eq and Ord instances for tuples up to size 62

We ran into the lack of Eq instances on large tuples when testing large tuple support in Persistent (https://github.com/yesodweb/persistent/pull/1087)

This is not to condone the use of such large tuples in practice. However, if we have to have an arbitrary limit on tuple size, I'd rather not have a second arbitrary limit on the size of the Eq/Ord instances