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