Merge pull request #196 from giorgio130/master

Fix some dumb mistakes, toggle light now works
Merge pull request #197 from giorgio130/master

update koreader-base.
add icon button and show/hide method of button
add page up/down buttons in menus that have more than one pages
Merge pull request #198 from chrox/page_button

add page up/down buttons in menus that have more than one pages