Merge pull request #71 from houqp/houqp-master

update koreader-base and bug fix in touch menu
Merge pull request #72 from houqp/houqp-master

add simple readerhyphenation menu
Merge pull request #75 from houqp/houqp-master

update translation
fix occasionally failed lipc invocation
increase max size of cache item
don't bother to consume background context
since now each context is independent and has its own dst bitmap.
recalculate zoom when toggling flipping mode
recalculate zoom when changing font size
Merge pull request #78 from chrox/kctx_fix

bugfix: fix occasional reader crash when change screen mode from landscape to portrait in reflow mode
fix: set ReaderView.view_mode instead of ReaderUi.view_mode
credoc fix: load metadata info after document is rendered
enable rolling by pan gesture in readerrolling