Fix #1371321 [HTML Paragraph Tag Shown In Bottom Status Bar](https://bugs.launchpad.net/calibre/+bug/1371321)
New formatter function raw_list. Analog of raw_field but for list fields like tags.
Template language: New template function raw_list() to return the items in a list such as tags without any sorting/formatting applied to them.

Merge branch 'master' of https://github.com/cbhaley/calibre
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Fix #1371226 [Show Checkmarks in derivated custom columns does not properly work in Spanish (at least)](https://bugs.launchpad.net/calibre/+bug/1371226)
Fix podofo 0.9.3 faillilng with test file

Use a slightly different test file
Implement v2 codesigning for the calibre app bundle on OS X

calibre is now built on 10.9.5 as that is the only version of OS X that
supports v2 codesigning. v2 codesigning is required for Gatekeeper on
all versions of OSX >= 10.9.5
Edit metadata dialog: Allow undoing a metadata download by long-clicking the Download metadata button and choosing "Undo last metadata download"