Check if repository was moved

[Firebird1029]

The open repo currently cannot detect if/when a repo from its static list of repos has been moved or deleted. This can cause the script to break. The script can be made more robust by accounting for any repos that have been moved/renamed/deleted/etc. and returning the updated location of the repository.

         There is an API endpoint to check to see if a repository was moved and it returns the new location so we could set up a method to check for that. The endpoint is in the format `https://api.github.com/repos/<repo_group>/<repo_name>` and will tell you the new location if the repository has been moved. 

Originally posted by @IsaacMilarky in #35 (comment)