Update to 1.49:

1.49 Fri 31 Jul 2015
    - Fails on unseekable file handle after desiredCompressionLevel(), RT #54827
    - Upgrade build tools to avoid tar warnings, RT #105547

1.48 Thu 18 Jun 2015
    - Wrap skip in a SKIP: block [github/plicease]

1.47 Wed 17 Jun 2015
    - zip file with a deflated directory cannot be written out again [github/ntyni]
    - add missing test data to MANIFEST

(wiz)