Add device ids for new Kobo Aura

Fixes #1220693 [Add device id for new Kobo Aura](https://bugs.launchpad.net/calibre/+bug/1220693)
pep8
Fix changing language in welcome wizard

Fix changing the user interface language in the welcome wizard causing
some parts of the interface to remain in the old language until calibre
is restarted. Fixes #1220767 [Language mismatch on the welcome wizard e-mail page & throughout the rest of the program UI](https://bugs.launchpad.net/calibre/+bug/1220767)
Delay eval column headers so that language change works
Fix set_custom legacy API for series fields with index in value

Fixes #1220914 [db.set_custom on custom series column ignores [number]](https://bugs.launchpad.net/calibre/+bug/1220914)
Conversion: Add support for the CSS3 rem font size unit
pep8
pep8
Kobo driver: Sideloaded kepubs not added from device properly

When a sideloaded kepub is added from a Kobo device to the calibre
library, it is added as an epub, but the file copied is corrupt.
Fixes #1221035 [Sideloaded kepubs not added to library correctly](https://bugs.launchpad.net/calibre/+bug/1221035)
PDF Output: Workaround for broken Qt font-variant handling

PDF Output: Workaround a bug in the library calibre uses to render HTML
to PDF that caused text in some documents that used small-caps fonts to
not render correctly. Fixes #1216354 [Private bug](https://bugs.launchpad.net/calibre/+bug/1216354)
...
User manual updates
Show number of dups found
version 1.2
Update High Country News
Fix dump and restore on memory limited systems
newdb: Handle databases with case duplicates

databases created with pre 1.0 versions of calibre could have multiple
tags/series/publishers/etc. that differ only in the case. This is
because sqlite's case handling only works for ascii characters.
This could cause problems when setting metadata.
Automatically detect and fix these databases. Fixes #1221545 [edit metadata individually>Download Metadata>press ok>unhandled exception](https://bugs.launchpad.net/calibre/+bug/1221545)
DOCX Input: Handle images in footnotes and endnotes

Fixes #1221686 [conversion from docx cannot handle images in footnotes](https://bugs.launchpad.net/calibre/+bug/1221686)
Do not scroll the book list horizontally after editing metadata

Fixes #1221552 [Changing column view of boooks to title as first column when starting to "edit metadata individually"](https://bugs.launchpad.net/calibre/+bug/1221552)
Update Anandtech