类似于ViewPagerIndicator，用RecyclerView来实现ViewPager，并加上Indicator
大致分为六个部分：
1.Circle 圆圈提示器
2.Icon 图标提示器
3.Line 线段提示器
4.Tab 标签提示器
5.Title 标题提示器
6.Underline 下划线提示器
该工程项目修改及使用了以下项目：
https://github.com/JakeWharton/ViewPagerIndicator
https://github.com/lsjwzh/RecyclerViewPager
https://github.com/blipinsk/RecyclerViewHeader
对三位作者表示深切的感谢～
Gradle usage：
dependencies {
compile 'com.buyi.recyclerviewpagerindicator:recycler-viewpager-indicator:1.1'
}
Circle 圆圈提示器：
FragmentsAdapter adapter = new FragmentsAdapter(getSupportFragmentManager());
pager.setAdapter(adapter);
LinearLayoutManager manager = new LinearLayoutManager(this);
manager.setOrientation (LinearLayoutManager.HORIZONTAL);
pager.setLayoutManager(manager);
indicator.setViewPager(pager);
indicator.setFillColor(Color.parseColor("#FF33B5E5"));
Icon 图标提示器
// config adapter
FragmentsAdapter adapter = new FragmentsAdapter(getSupportFragmentManager());
pager.setAdapter(adapter);
// config layoutmanager
LinearLayoutManager manager = new LinearLayoutManager(this);
manager.setOrientation (LinearLayoutManager.HORIZONTAL);
pager.setLayoutManager(manager);
// config indicator
indicator.setViewPager(pager);
Line 线段提示器
FragmentsAdapter adapter = new FragmentsAdapter(getSupportFragmentManager());
pager.setAdapter(adapter);
LinearLayoutManager manager = new LinearLayoutManager(this);
manager.setOrientation(LinearLayoutManager.HORIZONTAL);
pager.setLayoutManager(manager);
indicator.setViewPager(pager);
Tab 标签提示器
FragmentsAdapter adapter = new FragmentsAdapter(getSupportFragmentManager());
pager.setAdapter(adapter);
LinearLayoutManager manager = new LinearLayoutManager(this);
manager.setOrientation(LinearLayoutManager.HORIZONTAL);
pager.setLayoutManager(manager);
indicator.setViewPager(pager);
Title 标题提示器
FragmentsAdapter adapter = new FragmentsAdapter(getSupportFragmentManager());
pager.setAdapter(adapter);
LinearLayoutManager manager = new LinearLayoutManager(this);
manager.setOrientation (LinearLayoutManager.HORIZONTAL);
pager.setLayoutManager(manager);
indicator.setViewPager(pager);
indicator.setTextColor(Color.parseColor("#000000"));
indicator.setSelectedColor (Color.parseColor("#FF33B5E5"));
Underline 下划线提示器
FragmentsAdapter adapter = new FragmentsAdapter(getSupportFragmentManager());
pager.setAdapter(adapter);
LinearLayoutManager manager = new LinearLayoutManager(this);
manager.setOrientation (LinearLayoutManager.HORIZONTAL);
pager.setLayoutManager(manager);
indicator.setViewPager(pager);