Download cover for New Yorker
Conversion: Do not strip underscores from classnames. Fixes #1349442 [All converting epub styles with class"_number_name" are corrupt.](https://bugs.launchpad.net/calibre/+bug/1349442)
Add a parameter to control marking book as modified when calling apply_container_update_to_gui()
Nicer debug output when a plugin's thread is missing the plugin zip file
Preferences UI for configuring emblems to be displayed in the cover grid, next to covers
A button to remove images used as column icons/grid view emblems
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Edit Book: Fix subsetting of fonts not working if the text contains non-BMP unicode characters. Fixes #1349856 [Error using "Subset all Fonts"](https://bugs.launchpad.net/calibre/+bug/1349856)
Fix #1349536 [convert do not preserve spaces in <pre>](https://bugs.launchpad.net/calibre/+bug/1349536)
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E-book Viewer: Use wiktionary.org and wordnik.com as dictionary providers instead of dict.org (which no longer exists).

When looking up words, the word definition is now opened in a separate
browser window.  The language of the dictionary to lookup is
automatically selected based on the language of the current book. Fixes #1349548 [dict.org not available](https://bugs.launchpad.net/calibre/+bug/1349548)
Change fosshub mirror used for uploading.
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DRYer
Edit Book: Allow the import files into book action to be added to the toolbar
Edit Book: Clear the Check Book panel when opening a new book
Edit Book: Live CSS: Improve detection of which tag the cursor is inside when there are multiple tags on the same line. See #1350495 (Private bug)
Implement rendering of cover grid emblems
Add a preference to turn emblems on/off
Options to control the size and placement of the emblems