private void createNavigationButtons() {
        LayoutInflater inflater = LayoutInflater.from(getContext());
        flNavigationButtons = (FrameLayout) inflater.inflate(R.layout.calendar_navigation_buttons, this, false);

        setPreviousNavigationButton();
        setNextNavigationButton();

        addView(flNavigationButtons);
    }
Creates Next/Previous buttons to navigate months.
Visible only in HORIZONTAL mode
cosmocalendar/src/main/java/com/applikeysolutions/cosmocalendar/view/CalendarView.java