Uses scalaz.Order instead of scala.Ordering
fix Cofree

1. remove unnecessary parameter
2. `object Cofree` should be extends `CofreeInstances`
Remove Endo#fix; add fix utility for functions, and test that it can be used.
Merge pull request #409 from xuwei-k/request/fix-cofree

fix Cofree
Merge pull request #410 from S11001001/topic/function-fix

Replace Endo#fix with a utility function
Merge pull request #405 from nkpart/scalaz-seven

Adds sort functions to NonEmptyList
type class Optional[F[_]]

- abstracts over containers/contexts which may provide a value or not

- instances:
  - scala.Option
  - scalaz.LazyOption

- provides syntax.OptionalOps

- tests for all the functionality
Merge pull request #392 from larsrh/topic/deprecate-classes

Deprecate `Length`, `Each` and `Index`
merge branch scalaz-seven
integrate Optional into GenTypeClass
provide concrete orElse in Optional
provides nonEmpty as an alias for isDefined for Optional
provides Optional instance for scalaz.\/
provides Optional instance for LazyEither
Rename OnePlus to OneAnd, with the intention of introduction OneOr which uses (F[A] \/ A) instead of (F[A] Tuple2 A). Introduce OneOr data type. OneOr[F[_], A] ≅ F[A] \/ A
provides Optional instance for Validation
sbt 0.12.4
update README.md s/7.0.0/7.0.1
fix typo
More trampolining in IO