[Answer]-Error: failed to push some refs to 'git@heroku.com:dry-plains-3718.git'

I believe cedar recognizes django apps by the existance of a requirements.txt file.

Pleaee check is to be sure you have created ‘requirements.txt’ and ‘Procfile’ in the root of your source tree that is being pushed. The names are case sensitive.

This tutorial includes instructions on creating them:

https://devcenter.heroku.com/articles/django