Added docs for cache() and sequence property
Added docs for cache() and sequence property

EntilZha/PyFunctional,ChuyuHsu/ScalaFunctional,EntilZha/ScalaFunctional,EntilZha/ScalaFunctional,lucidfrontier45/ScalaFunctional,ChuyuHsu/ScalaFunctional,EntilZha/PyFunctional,lucidfrontier45/ScalaFunctional