started the creating a pull request section

Creating a pull request

Creating a pull request: head branch dropdown

Creating a pull request: title and description and send pull request

Creating a pull request: open pull request screen shot

Using a pull request: comments, commits, diff, and in line comments

Merging a pull request: merge pull request button

Merging a pull request: merging locally

Merging a pull request: rebase discussion

Merging a pull request: rebase commands

Merging a pull request: squashing commits

Merging a pull request: force push
Updated screen shots