bug#26924: [PATCH 0/12] Update Calibre to 2.85.1

[Brendan Tildesley]

There is still much to do, but I think if fixed more than I've broken,
so I'll post these patches now. I'm not sure if I should have rebased
them into fewer commits, but that's easier to do than to split them
apart again.

TODO

* Test numerous features of the program on GuixSD.

* .desktop files, icons. linux.py contains some .desktop files and other
data, but they don't seem to get installed. When installed,
/gnu/store/...-calibre-2.85.1/share/appdata/calibre-* contains .xml
files There does not appear to be any desktop files installed by default.

* MIME data stuff. Not sure how it works. Gentoo has loads of strange
hacks.

* Package & Unbundle:

** python2-cherrypi

** python2-routes

** Mathjax

** Seen in debian package definition:

*** jquery-ui-multiselect-widget

*** jquery-ui

*** Datejs-all-Alpha

* Not sure if dnspython is even used?

The last thread for this package is here: 
https://lists.gnu.org/archive/html/guix-devel/2015-02/msg00478.html

Unrar is removed, markdown unbundled, and I checked that the  "freeware"
icon data is actually GPLv2 (
http://www.zwahlendesign.ch/downloads2/openoffice_icons.zip )