Use Qt to draw catalog covers and mastheads as well
DRYer
Use a check box instead of a button to save cover generation settings as defaults
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Update Wall Street Journal

Fixes #1373492 [Wall Street Journal not pulling articles](https://bugs.launchpad.net/calibre/+bug/1373492)
Update Today's Zaman
Al Monitor by spswerling
Hurriyet Daily News by spswerling