Use 'Option.fold()()' instead of '.map()'.
Merge pull request #84 from tvierling/option-fold

Use 'Option.fold()()' instead of '.map()'.
fix pocorall/scaloid#87
fix typo 'InterfaceImplicits'
Merge pull request #89 from tvierling/typo-fix

fix typo 'InterfaceImplicits'