Added `gh create repo`
Added `gh create repo`

Creates a repository on GitHub, initializes a new git repo locally,
creates an empty README file, then pushes your empty repo to GitHub.

Accepts --markdown --textile and --rdoc flags, for specifying the
README's default extensions.

Depends on a local GitHub config.
See http://github.com/guides/local-github-config

jarib/github-gem,peterkinalex/github-gem,thetaxman/github-gem,rlqualls/github-gem,Wirachmat/github-gem,kohsuke/github-gem,reenhanced/github-gem,defunkt/github-gem,supriyantomaftuh/github-gem,DarcRanger/github-gem