Update to 1.3119

Upstream changes:
1.3119 26.10.2013

    [ ENHANCEMENTS ]
    * GH #965: Serializer also serialize content for DELETE.
        (reported by Achim Adam)

    [ BUG FIXES ]
    * GH #959: hash randomization could cause .pl MIME to vary and test
        to fail. (Olof Johansson)
    * GH #961: fix bug in require_environment's logic. (reported by
        sapphirecat)

    [ DOCUMENTATION ]
    * GH #962: Improvements of the Dancer::Test docs. (Tom Hukins)

(wen)