B12_push_a_branch.txt

 Pull request:
 	1. git checkout -b <feature branch>
 	2. git push origin <branch>
 	3. create a pull request on Github
 	4. review code
		4.1. review code online (github)
		4.2.1. fetch branch into local to test offline (optional)
		4.2.2 . checkout <branch>
		4.3. approve the pull request.
 	5. merge to master