Add BDD

[huodahaha]

As a developer
I need to my behavior test to be automated.
So that it will save a lot of time during the integration test

Assumptions:

• Use selenium as a webdriver to test all the features.
• Use behave as a BDD framework

Acceptance Criteria:

Given behave as a BDD framework
Whenever there is a change in the Master branch
Then we can run the BDD test.