Release 1.0.8+1

1167b13 release 1.0.8
01adf91 force invocation of listeners for 'seeked' event, even if old and new values are equal
f428d45 cleanup
4da03fa move stop button to the right
91a57a6 introduce checkEnable with ActionButton
ff51388 buttons for rewind and fast forward by 10 seconds added
837a6b8 upgrade gradle and java versions
86084ea explicit close and save buttons removed
5c18cb4 upgrade
0be6cce goBack added
96f952d initialize controllers in initState
a83eb00 upgrade ndkVersion