Fix the read metadata from format button in the edit metadata dialog not working for FB2 files. Fixes #1385237 [Crash when extracting metadata from fb2](https://bugs.launchpad.net/calibre/+bug/1385237)
Edit Book: Fix links that are absolute paths causing crashes in windows
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Fix #1385384 [Little typo](https://bugs.launchpad.net/calibre/+bug/1385384)
Update FAZ net
Confirmation dialog: Rewrite getting rid of the use of Qt Designer. Now works with any sized icon images.
Template language: New function user_categories() to return the list of User Categories for a given book (only works in the GUI).

Merge branch 'master' of https://github.com/cbhaley/calibre
Changes to user_categories_for_books as discussed in messages, plus fixing a problem in the formatter function where duplicates could be generated.