Basic thoughts for this framework

1. There should have a BasePage.py to be the parent page and all the page object should inherit this class
2. BasePage.py should define some common actions to the page like back, forward, click, find element...
3. Need to determin the object should store in a single folder or different page object
4. Should add a configure file to document some common configuration like Browser, URL...
5. Unittest framework should be included?