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update format detection in publio store
update author detection in cdp store
update ebooks detection in woblink store
Get Books: Update the Woblink, Publio and CDP store plugins
update author detection in woblink store
update author detection in wolnelektury store
Merge branch 'master' of https://github.com/t3d/calibre
Edit book: Fix regression that caused program to stop responding when quitting via File->Quit
Dont mark keyboard shortcuts for translation. Fixes #1280403 [Double key assignment (in german only?)](https://bugs.launchpad.net/calibre/+bug/1280403)
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Read XMP metadata from PDF files
Add support for reading/writing XMP metadata packets to the PoDoFo bindings
Fix #1280606 [Similar Books doesn't escape double quotes in search string](https://bugs.launchpad.net/calibre/+bug/1280606)
Some documentation
Edit book: When autofixing file extensions <-> mimetype mismatch, if the file in question is int he spine, chage the file extension rather than the mimetype, as that is more likely to be the correct fix.
Initial implementation of writing XMP metadata to PDF

Lots more work/testing needed
Update Mac World UK
Add a DOI check function to metadata
Add dc:identifier check for DOI & doi validation