Tags: ghp268/golang-set

Fix PowerSet return values

Previously, calling `PowerSet()` on a `threadSafeSet` would return a `threadUnsafeSet` of `threadUnsafeSet`s. Now it returns a `threadSafeSet` of `threadSafeSet`s.

add Each method

exposed orderedPair (now OrderedPair) and its fields (deckarep#41)

Merge pull request deckarep#26 from Vector919/spelling_fix

quick typo fix for cartesian product README updates

Emphasize the update.