Merge pull request #443 from giorgio130/master

Fix corner case for Kobo Aura: tev.id == -1 with tev.x and tev.y values defined.
add missing registry for fb2 document
fix missing Device in readerscreenshot
enlarge tappable link box
should lookup dictionary for Chinese word now
tweaks on default page margins
Merge pull request #453 from chrox/master

add missing registry for fb2 document
udpate translation
update battery state on device resume
Merge pull request #456 from houqp/houqp-master

update battery state on device resume
Avoid crash if trying to open a non-existent file

which currently might occur by clicking in the history entry of a file which was removed
add text highlight for credocument
Three highlight drawers "lighten", "underscore" and "invert" are
available in reader menu.
This should implement #176.
add font size fine tuning for crereader
Merge pull request #458 from thotypous/master

Avoid crash if trying to open a non-existent file
Merge pull request #459 from chrox/master

add text highlight for credocument
fix nil page state when saving settings in ReaderPaging
This should fix #457.
return current page if top page state is nil in some corner cases
Merge pull request #460 from chrox/master

fix nil page state when saving settings in ReaderPaging
update koreader-base
Merge pull request #461 from chrox/master

update koreader-base