Adding requirements again
Changing the config values to get values from config vars
Adding new function to fired by scheduler exercises notification
Changing configuration to use variables environment
Changing the URL of the app from ysweatedyesterday to heroku
Removing schedule of this application because the schedule now is in another project hosted on google app engine
Patterning the names
Removing the shell because is not used
Changing to a best name
Adding security to send_exercise_notifications