Add use functionaliy

[Shlok Patel]

Use templates on GitHub to create a new project.
The following workflow has been decided.

• Parse github repo
• Get recipe.json
• prompt preferences
  • Prompt Project name
  • Prompt template
  • Prompt variables
• If successful download .tar.gz
• extract .tar.gz
  • If -C flag is present cache it.
• Execute the required template

Download the repo as .tar.gz