remove dead code
Merge pull request #372 from xuwei-k/remove-set-each

remove dead code
Option coflatten/coflatMap
List coflatten/coflatMap
NullResult
NullResult
NullResult
Cobind and Cojoin instances for Option
Cobind and Cojoin instances for List
Merge branch 'scalaz-seven' into topic/nullfunction
NullArgument
NullArgument and NullFunctiopn
NullArgument and NullFunction
NullArgument and NullFunction
list values
NullResult instances
NullArgument instances
Split extends Compose (semigroupoid), not Category -- there exist semigroupoids that are not categories but have products
merge fix to Split
NullArgument and NullResult instances