Merge branches 'new_ui_code' and 'new_ui_code' of github.com:houqp/kindlepdfviewer into new_ui_code
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
Merge pull request #721 from houqp/new_ui_houqp

add css file selection menu for crengine
update k2pdfopt to version 1.64a
Merge pull request #729 from chrox/new_ui_code

update k2pdfopt to version 1.64a
add toggle switch widget in config option
Merge pull request #730 from chrox/toggle_switch

add toggle switch widget in config option
add blitToBufferRotate to blitbuffer.c
first demo of screen rotate
ReaderConfig: bind touch event listener range with widget dimen

So we only need to change widget dimen on SetDimensions event
fix crash in goint into screen saver
add SetScreenViewMode event and related handler in ReaderView
add screen rotate to readerconfig
Merge branch 'new_ui_code' of github.com:hwhw/kindlepdfviewer into new_ui_code
add close button toggle for menu widget
add calling item.callback() as default onMenuChoice action
add menu to FileManager
add manual page crop for pdf/djvu documents