Using first CommonsWare techinque - overriding PagerAdapter's getPageWidth() method.
It works but the downside for me is that fragments width is equal.
Hey, I can define page width according to page position!
No need for tabs in landscape mode
Display screen dimension - it's useful to know.
See http://stackoverflow.com/a/11755265/981083
Use multi pane "layout" when screen width is more than 500 dp
Remove unneeded FrameLayout
Merge branch 'feature/task_3' into dev