Merge pull request #59 from onyx-peekaboo/master

Add remove a book from the database method
delete a useless string.
Merge pull request #60 from qiujiejun/master

delete a useless string.
set default TTS language (if empty) according to current locale.
Merge pull request #61 from onyx-cap/master

set default TTS language (if empty) according to current locale.
OnyxAndroidSDK:Modify the distribution of the click event
make adjusting volume always possible
Merge remote-tracking branch 'onyx-intl/master'
Merge pull request #62 from onyx-peekaboo/master

Modify the distribution of the click event in OnyxGridView
Merge pull request #63 from onyx-cap/master

make adjusting volume always possible.
OnyxAndroidSDK:Intercept volume keys function in the OnyxGridView
Merge remote-tracking branch 'origin/master'