github_create_repo: Create a repository on GitHub
In romainfrancois/travis: Set Up 'Travis' for Testing and Deployment

Creates a GitHub repository.

github_create_repo() only creates the repository on GitHub.

use_github() creates a GitHub repository for an existing Git repository, and connects both.

new_github() creates an empty Git repository with a single commit and a corresponding GitHub repository, and always pushes to GitHub.

github_create_repo(name, org = NULL, private = FALSE,
  gh_token = NULL, quiet = FALSE)

use_github(path = ".", push = NA, name = NULL, org = NULL,
  private = FALSE, gh_token = NULL, quiet = FALSE)

new_github(path, user = getOption("devtools.desc.author"), name = NULL,
  org = NULL, private = FALSE, gh_token = NULL, quiet = FALSE)

`name`	`[string]` The name of the new repository on GitHub, default: basename of the repo directory.
`org`	`[string]` The organization of the new repository on GitHub, default: user namespace, no organization.
`private`	`[flag]` Must be `FALSE`, creation of private repositories not yet supported.
`gh_token`	`[Token2.0]` GitHub authentication token, by default obtained from `auth_github()` with the "public_repo" and (if an organization repo) "write:org" scopes.
`quiet`	`[flag]` Set to `FALSE` to suppress success message.
`path`	`[string]` The path to the existing Git repository.
`push`	`[flag]` Should the contents of the existing repository be pushed to GitHub? Defaults to `FALSE` for non-interactive sessions, and asks the user in interactive sessions.
`user`	`[person\|string]` An object of class person, or a string that returns such an object when evaluated.