Returning a JArray if multiple matching fields are found.
Use Option.apply insted of toOpt in ExtractableJsonAstNode#getAs
Merge pull request #97 from wozaki/getas-opt

Use Option.apply insted of toOpt in ExtractableJsonAstNode#getAs
Merge branch 'master' of github.com:json4s/json4s
Merge branch 'master' into scala_1.10