Adds a script subtree.sh that, given a <subdeck> and a <remote> corresponding to a newly-created GitHub repository, converts that subdeck into a git subtree, creates a new repository for it on the user's machine, and pushes it to the remote.
From then on, the subtree in the main ki repository will track the specified remote.
Adds a script
subtree.shthat, given a<subdeck>and a<remote>corresponding to a newly-created GitHub repository, converts that subdeck into agitsubtree, creates a new repository for it on the user's machine, and pushes it to the remote.From then on, the subtree in the main ki repository will track the specified remote.