Fix read me sample to reflect this project.
Fix read me sample to reflect this project.

Klurige/Android-DirectionalViewPager,JakeWharton/Android-DirectionalViewPager,java02014/Android-DirectionalViewPager,chengkaizone/Android-DirectionalViewPager,YlJava110/Android-DirectionalViewPager,evasteingrims/Android-DirectionalViewPager,b-cuts/Android-DirectionalViewPager,ylfonline/Android-DirectionalViewPager,AndrewGeorge/Android-DirectionalViewPager,hzy87email/Android-DirectionalViewPager,HiWong/Android-DirectionalViewPager,0359xiaodong/Android-DirectionalViewPager