Fixed typo(?) in set_metadata() for touched files.
Merge branch 'master' of https://github.com/kovidgoyal/calibre
Update iprofessional

Fixes #1195826 [Updated recipe for iprofessional](https://bugs.launchpad.net/calibre/+bug/1195826)
DOCX Input: Support horizontal rules

DOCX Input: Add support for horizontal rules created by typing three
hyphens and pressing enter.
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Fix #22 (Remove double article entries which are already part in other rss feeds of the same recipe)
deduplicate code snippet
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Added mkdir() to libiMobileDevice
Polish: Add option to embed referenced fonts

Book polishing: Add option to embed all referenced fonts when polishing
books using the "Polish Books" tool. Fixes #1196038 [[enhancement] embed font without conversion](https://bugs.launchpad.net/calibre/+bug/1196038)
Revert "Fixed typo(?) in set_metadata() for touched files."

This reverts commit 8f30c17486701bf2cc29a84c98af5336de75fc56.
Driver for PocketBook Surfpad 2

Fixes #1182850 [Private bug](https://bugs.launchpad.net/calibre/+bug/1182850)
Fix #25 (bugfix: pass book_id to FileType plugins on postimport instead of __builtins__.id())
Fix docstring of is_image_collection
Democracy Now by Antoine Beaupre
Add warning about font licensing to embed options