Fix a rare crash on ReaderHighlight
Merge pull request #173 from thotypous/master

Fix a rare crash on ReaderHighlight
Merge pull request #174 from giorgio130/master

WIP kobo light support
fix require error
update koreader-base for crengine update
Merge pull request #175 from houqp/houqp-master

fix require error
Merge pull request #177 from houqp/houqp-master

update koreader-base for crengine update
update koreader-base
Merge pull request #178 from chrox/update_crengine

update koreader-base
fix libpng conflict in libk2pdfopt
fix nil pos bug in readerhighlight
Merge pull request #182 from chrox/master

fix nil pos bug in readerhighlight
update koreader-base
Merge pull request #184 from houqp/houqp-master

update koreader-base
only set two pages mode for crengine in kindle dxg
Merge pull request #186 from houqp/houqp-master

only set two pages mode for crengine in kindle dxg
fix fractional pix returned by scaleByDPI
add vertically scrollable text widget
fix long definition not shown properly in dictionary window
Merge pull request #187 from chrox/scroll_text

fix long definition not shown properly in dictionary window