export app code to git + clone to github

[7yl4r]

We can copy the code into git for versioning.
Clicking the "save" button seems to create a git repo stored on google's git servers.
From there we can clone these repos to github.

• "save" to google's git servers
• git clone the repo to your local machine
• create new empty repo on github
• `git remote add github_remote https://github.com/usf-imars/3d
• git push github_remote to upload code to github
• add github repo link to description on app page
• do this for both apps