fix multi-touch in Android
Merge pull request #180 from chrox/master

fix multi-touch in Android
android fb should invert according to screen fb
handle key and cmd events on Android
Merge pull request #181 from chrox/master

handle key and cmd events on Android
refactor(pic): finsih ffi binding
feature(blitbuffer): add scale method

scale method allocates a new blitbuffer with scaled width and height
feature(blitbuffer): add isEqual method
test(blitbuffer): style cleanup & add scale and isEqual tests.
Merge pull request #182 from houqp/pic

finish ffi binding for pic module
clean(build): remove libkoreader-pic module
update OpenSSL 1.0.1g -> 1.0.1h