TISTUD-5061 Add support to create github forks
  - Add import wizard to fork github repos
  - fork, clone and then set upstream on clone.
  - modify CloneJob to be able to get the list of projects it created.
  - Add fork method to github API
Merge pull request #96 from sgtcoolguy/TISTUD-5061

TISTUD-5061 Add support to create github forks