[ChangeLog][QtCore][QResource] Added uncompressedSize() and
uncompressedData(), which will perform any required decompression on the
data, prior to returning (unlike data() and size()).
Change-Id: Ief874765cd7b43798de3fffd15aa053bc505dcb1
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Thiago Macieira