mono/mono — pull request #1255 by ash-lshift (2014-09-04 13:09:19+00:00)
Title: fix PackagePart.GetRelationships for readonly files

Fixes this bug: https://bugzilla.novell.com/show_bug.cgi?id=675379

'PackagePart.GetRelationships throws an "Operation not valid when package is read-only" exception when package is open with only read presmissions'