Add seek bar
Add TopBar and hide ActionBar
Merge branch 'dev_alexandr'

Conflicts:
	app/src/main/java/com/noveogroup/vuplayer/MainActivity.java
	app/src/main/java/com/noveogroup/vuplayer/VideoFragment.java
	app/src/main/java/com/noveogroup/vuplayer/VideoPlayer.java
	app/src/main/res/layout/fragment_video.xml
	app/src/main/res/values/dimens.xml