Update Carta
Add a few more EXTH header fields when dumping MOBI
AZW3: Preserve the page-progression-direction property when converting/editing/polishing AZW3 files
...
When dumping joint MOBI files, properly extract all image/font resources and only put resources upto the KF8 boundary in the mobi6 part
When dumping MOBI files for debugging also dump container records and HD images
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Modified EPW recipe to remove unwanted text and links from final articles, reduced oldest article count to 7 to reflect weekly nature of the paper, added more metadata information
Update EPW

Merge branch 'master' of https://github.com/kannankarthik/calibre
AZW3: When converting from AZW3 files, use the high quality version of the image if the source AZW3 file contains both low and high quality images
Finish the framework for the edit book plugins
Port compiling of .ui forms
Port imports
Port build script for building PyQt extensions to PyQt5
Port the progress indicator extension to PyQt5
Allow controlling PyQt5 import path via the env var PYQT5_IMPORT_PATH
faster builds
Get rid of the PyQt4 string from everywhere
Port: setMargin() reset() QStringList()

setMargin(): QLayout no longer has a setMargin() function, replace with
setContentsMargins()

reset(): QAbstractListModel no longer has reset(), replace with
beginResetModel(), endResetModel()

QStringList: No longer exists, a simply python list of strings works
instead
Fix mouse wheel not working in diff view