[App] Fix: Did not return value.
[App] New: Set/Get Mime method
[OnePiece5] Fix: Strict error
[NewWorld5] Fix: Output of the Content-type header
[OnePiece5] Fix: Could support the alias feature of the Apache.
[NewWorld5] Fix: Could support the alias feature of the Apache.
Merge pull request #2 from BookJapan/master

Master